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Holly Cummins
Devoxx Belgium
Zero Waste,
Radical Magic
and Italian Graft
Quarkus Efficiency Secrets
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@holly_cummins
Rust
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@holly_cummins
Rust
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@holly_cummins
Q: Is Rust efficient?
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@holly_cummins
Q: Is Rust efficient?
A: Yes, very.
Obviously.
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@holly_cummins
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@holly_cummins
Rust is too hard to learn
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@holly_cummins
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@holly_cummins
too difficult to be widely adopted
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@holly_cummins
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@holly_cummins
approach with trepidation
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@holly_cummins
approach with trepidation
notoriously difficult learning curve
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@holly_cummins
“Rust is the hardest programming
language up to that time I’ve met.”
-Michael Vaner
https://vorner.github.io/difficult.html
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@holly_cummins
Rust has no garbage collection.
(Sort of.)
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@holly_cummins
Rust has no garbage collection.
(Sort of.)
What happens if we give Rust GC?
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@holly_cummins #RedHat
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@holly_cummins #RedHat
more likely to complete the task
required only about a third as much time
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@holly_cummins #RedHat
Oh. Maybe Rust isn’t efficient.
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@holly_cummins
Rust
human
efficiency
machine
efficiency
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@holly_cummins
Rust
human
efficiency
machine
efficiency
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@holly_cummins
can we do better?
#RedHat
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@holly_cummins #RedHat
can we do better?
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@holly_cummins
Enter … Quarkus.
#RedHat
A Java framework that gets you going faster, faster.
can we do better?
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Quarkus applications start fast
Quarkus + graalvm 0.014 Seconds
REST application
Quarkus + open jdk 0.75 Seconds
traditional cloud-native stack 4.3 Seconds
https://Quarkus.io/blog/runtime-performance/
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@holly_cummins
machine
Quarkus
Quarkus
Quarkus
Quarkus
Quarkus
Quarkus
Quarkus
Quarkus
Quarkus
Quarkus
Quarkus
Quarkus
Quarkus
Quarkus
container orchestration
machine
traditional cloud-native java stack
traditional cloud-native java stack
traditional cloud-native java stack
traditional cloud-native java stack
Quarkus applications have high deployment density.
Quarkus native
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@holly_cummins
machine
Quarkus
Quarkus
Quarkus
Quarkus
Quarkus
Quarkus
Quarkus
Quarkus
Quarkus
Quarkus
Quarkus
Quarkus
Quarkus
Quarkus
container orchestration
machine
traditional cloud-native java stack
traditional cloud-native java stack
traditional cloud-native java stack
traditional cloud-native java stack
Quarkus applications have high deployment density.
Quarkus native
(but Quarkus on
JVM is also way
smaller than
traditional java)
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@holly_cummins
traditional cloud-native
java stack
traditional cloud-native
java stack
traditional cloud-native
java stack
traditional cloud-native
java stack
node.js
node.js
node.js
node.js
node.js
node.js
node.js go
go
machine
go go go
go go go
go go go
go go go
go go go
go go
go go
Quarkus
Quarkus
Quarkus
Quarkus
Quarkus
Quarkus
Quarkus
Quarkus
Quarkus
Quarkus
Quarkus
Quarkus
Quarkus
Quarkus
… and not just when comparing to other Java frameworks
container orchestration
machine machine machine
https:/
/developers.redhat.com/blog/2017/03/14/java-inside-docker/
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Let’s talk about throughput.
https://www.redhat.com/en/resources/mi-quarkus-lab-validation-idc-analyst-paper
48 concurrent
connections
Traditional cloud native stack 3555 req/s
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Let’s talk about throughput.
quarkus native 3212 req/s
https://www.redhat.com/en/resources/mi-quarkus-lab-validation-idc-analyst-paper
48 concurrent
connections
Traditional cloud native stack 3555 req/s
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Let’s talk about throughput.
quarkus native 3212 req/s
https://www.redhat.com/en/resources/mi-quarkus-lab-validation-idc-analyst-paper
a trade-off of throughput
against footprint
48 concurrent
connections
Traditional cloud native stack 3555 req/s
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@holly_cummins
Native compilation trade-offs
throughput
startup time +
footprint
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@holly_cummins
Native compilation trade-offs
throughput
startup time +
footprint
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but …
traditional cloud native stack 3555 req/s
quarkus native 3212 req/s
https://www.redhat.com/en/resources/mi-quarkus-lab-validation-idc-analyst-paper
a trade-off of throughput
against footprint
48 concurrent
connections
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but …
traditional cloud native stack 3555 req/s
quarkus on jvm 6389 req/s
quarkus native 3212 req/s
https://www.redhat.com/en/resources/mi-quarkus-lab-validation-idc-analyst-paper
a trade-off of throughput
against footprint
48 concurrent
connections
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but …
traditional cloud native stack 3555 req/s
quarkus on jvm 6389 req/s
quarkus native 3212 req/s
https://www.redhat.com/en/resources/mi-quarkus-lab-validation-idc-analyst-paper
no trade-off, just better :)
a trade-off of throughput
against footprint
48 concurrent
connections
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@holly_cummins
we beat the trade-off.
throughput
startup time
+ footprint
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@holly_cummins
we beat the trade-off.
throughput
startup time
+ footprint
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@holly_cummins
we beat the trade-off.
throughput
startup time
+ footprint
it’s a double-win.
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No content
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@holly_cummins
what’s the secret?
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@holly_cummins
what’s the secret?
what are the secrets?
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@holly_cummins
Challenge assumptions.
African wild ass
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@holly_cummins
Challenge assumptions.
Challenge outdated assumptions.
African wild ass
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@holly_cummins
ssssshhhhhhhh! it’s a secret!
Don’t be dynamic.
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@holly_cummins
ssssshhhhhhhh! it’s a secret!
Don’t be dynamic.
(Wait, what??)
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@holly_cummins
#RedHat
old Java frameworks were
optimised for …
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@holly_cummins
#RedHat
long-lived processes
old Java frameworks were
optimised for …
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@holly_cummins
#RedHat
long-lived processes
annual (!) deployments
old Java frameworks were
optimised for …
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@holly_cummins
#RedHat
long-lived processes
annual (!) deployments
late-binding
old Java frameworks were
optimised for …
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@holly_cummins
#RedHat
long-lived processes
annual (!) deployments
late-binding
re-configurable without restart
old Java frameworks were
optimised for …
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@holly_cummins
#RedHat
application frameworks were
optimised for dynamism
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@holly_cummins
#RedHat
application frameworks were
optimised for dynamism
dynamism has a cost
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@holly_cummins #RedHat
cloud apps are
immutable
now
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@holly_cummins #RedHat
cloud apps are
immutable
now
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@holly_cummins
#RedHat
a highly dynamic
runtime in a container
is pointless
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@holly_cummins
Java dynamism
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@holly_cummins
Java dynamism
build time
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@holly_cummins
Java dynamism
build time runtime
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@holly_cummins
Java dynamism
build time runtime
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@holly_cummins
Java dynamism
packaging
(maven, gradle…)
build time runtime
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@holly_cummins
Java dynamism
build time runtime
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@holly_cummins
Java dynamism
build time runtime
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@holly_cummins
Java dynamism
>
build time runtime
load and parse
• config files
• properties
• yaml
• xml
• etc.
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@holly_cummins
Java dynamism
>
build time runtime
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@holly_cummins
Java dynamism
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build time runtime
• classpath scanning and
annotation discovery
• attempt to load class to
enable/disable features
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@holly_cummins
Java dynamism
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build time runtime
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@holly_cummins
Java dynamism
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build time runtime
build a metamodel
of the world
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@holly_cummins
Java dynamism
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build time runtime
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@holly_cummins
Java dynamism
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build time runtime
start
• thread pools
• I/O
• etc.
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@holly_cummins
Java dynamism
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build time runtime
ready to
do work!
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@holly_cummins
what if we start the application more than once?
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@holly_cummins
what if we start the application more than once?
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@holly_cummins
what if we start the application more than once?
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@holly_cummins
what if we start the application more than once?
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@holly_cummins
what if we start the application more than once?
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@holly_cummins
what if we start the application more than once?
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so much work gets
redone every time
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@holly_cummins
Hibernate
startup speed example: JTA auto-wiring
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@holly_cummins
Hibernate
startup speed example: JTA auto-wiring
Class.forName(“LikelyJTAImplementation”);
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@holly_cummins
Hibernate
startup speed example: JTA auto-wiring
Class.forName(“LikelyJTAImplementation”);
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@holly_cummins
Hibernate
startup speed example: JTA auto-wiring
Class.forName(“LikelyJTAImplementation”);
Class.forName(“APossibleJTAImplementation”);
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@holly_cummins
Hibernate
startup speed example: JTA auto-wiring
Class.forName(“LikelyJTAImplementation”);
Class.forName(“APossibleJTAImplementation”);
Class.forName(“AnotherJTAImplementation”);
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@holly_cummins
Hibernate
startup speed example: JTA auto-wiring
Class.forName(“LikelyJTAImplementation”);
Class.forName(“APossibleJTAImplementation”);
Class.forName(“AnotherJTAImplementation”);
…
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@holly_cummins
Hibernate
startup speed example: JTA auto-wiring
Class.forName(“LikelyJTAImplementation”);
Class.forName(“APossibleJTAImplementation”);
Class.forName(“AnotherJTAImplementation”);
Class.forName(“NicheJTAImplementation”);
…
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@holly_cummins
Hibernate
startup speed example: JTA auto-wiring
Class.forName(“LikelyJTAImplementation”);
Class.forName(“APossibleJTAImplementation”);
Class.forName(“AnotherJTAImplementation”);
Class.forName(“NicheJTAImplementation”);
Class.forName(“VeryNicheJTAImplementation”);
…
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@holly_cummins
Hibernate
startup speed example: JTA auto-wiring
Class.forName(“LikelyJTAImplementation”);
Class.forName(“APossibleJTAImplementation”);
Class.forName(“AnotherJTAImplementation”);
Class.forName(“NicheJTAImplementation”);
Class.forName(“VeryNicheJTAImplementation”);
…
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@holly_cummins
Hibernate
startup speed example: JTA auto-wiring
Class.forName(“LikelyJTAImplementation”);
Class.forName(“APossibleJTAImplementation”);
Class.forName(“AnotherJTAImplementation”);
Class.forName(“NicheJTAImplementation”);
Class.forName(“VeryNicheJTAImplementation”);
…
~129
auto-wiring attempts
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@holly_cummins
Hibernate
startup speed example: JTA auto-wiring
Class.forName(“LikelyJTAImplementation”);
Class.forName(“APossibleJTAImplementation”);
Class.forName(“AnotherJTAImplementation”);
Class.forName(“NicheJTAImplementation”);
Class.forName(“VeryNicheJTAImplementation”);
…
~129
auto-wiring attempts
every single start.
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@holly_cummins
it’s not just JTA
this happens for lots of internal service bindings
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@holly_cummins
JVM
footprint example: Hibernate
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@holly_cummins
JVM spends time
loading classes for
specific databases
JVM
class for
unused
database
class for
unused
database
class for
unused
database
class for
unused
database
class for
unused
database
class for
unused
database
class for
unused
database
class for
unused
database
class for
unused
database
class for
unused
database
class for
unused
database
class for
unused
database
class for
unused
database
class for
unused
database
class for
unused
database
class for
unused
database
footprint example: Hibernate
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@holly_cummins
JVM spends time
loading classes for
specific databases
JVM
class for
unused
database
class for
unused
database
class for
unused
database
class for
unused
database
class for
unused
database
class for
unused
database
class for
unused
database
class for
unused
database
class for
unused
database
class for
unused
database
class for
unused
database
class for
unused
database
class for
unused
database
class for
unused
database
class for
unused
database
class for
unused
database
turns out they’re
never used
footprint example: Hibernate
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@holly_cummins
JVM spends time
loading classes for
specific databases
JVM
turns out they’re
never used
JIT spends time
unloading classes
footprint example: Hibernate
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@holly_cummins
Hibernate
example:
~500 classes
which are only useful if you're running an Oracle database
loaded and then unloaded
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@holly_cummins
Hibernate
example:
~500 classes
which are only useful if you're running an Oracle database
loaded and then unloaded
every single start.
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@holly_cummins
the true cost of loaded classes isn’t just memory + start time
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@holly_cummins
the true cost of loaded classes isn’t just memory + start time
method dispatching:
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@holly_cummins
interface
the true cost of loaded classes isn’t just memory + start time
method dispatching:
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@holly_cummins
unused
implementation
the one we
want
interface
unused
implementation
unused
implementation
the true cost of loaded classes isn’t just memory + start time
method dispatching:
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@holly_cummins
unused
implementation
the one we
want
interface
unused
implementation
unused
implementation
the true cost of loaded classes isn’t just memory + start time
method dispatching:
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@holly_cummins
unused
implementation
the one we
want
interface
megamorphic call
slow dispatching
unused
implementation
unused
implementation
the true cost of loaded classes isn’t just memory + start time
method dispatching:
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@holly_cummins
the true cost of loaded classes isn’t just memory + start time
the one we
want
interface
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@holly_cummins
the true cost of loaded classes isn’t just memory + start time
the one we
want
monomorphic call
fast dispatching
interface
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@holly_cummins
how do we fix all this?
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@holly_cummins
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build time runtime
what if we initialize at build time?
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@holly_cummins
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build time runtime
what if we initialize at build time?
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@holly_cummins
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build time runtime
start
• thread pools
• I/O
• etc.
what if we initialize at build time?
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@holly_cummins
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build time runtime
ready to
do work!
start
• thread pools
• I/O
• etc.
what if we initialize at build time?
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@holly_cummins
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repeated starts are now efficient
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@holly_cummins
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repeated starts are now efficient
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@holly_cummins
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repeated starts are now efficient
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@holly_cummins
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repeated starts are now efficient
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@holly_cummins
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repeated starts are now efficient
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@holly_cummins
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repeated starts are now efficient
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@holly_cummins
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repeated starts are now efficient
less wasted work
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@holly_cummins
the Quarkus way enables native compilation
native
(graalvm)
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jvm
build time
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@holly_cummins
the Quarkus way enables native compilation
native
(graalvm)
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jvm
build time
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@holly_cummins
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@holly_cummins
doing more up-front
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@holly_cummins
doing more up-front
- speeds up start
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@holly_cummins
doing more up-front
- speeds up start
- shrinks memory footprint
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@holly_cummins
doing more up-front
- speeds up start
- shrinks memory footprint
- improves throughput (!)
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@holly_cummins
implementation corollary:
libraries must participate in the build process,
not just the runtime process
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@holly_cummins
implementation corollary:
libraries must participate in the build process,
not just the runtime process
you need an extensible build process
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@holly_cummins
ssssshhhhhhhh! it’s a secret!
have the right plug-points,
so the whole ecosystem
can become faster
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@holly_cummins
build steps
+
build items
extensible builds
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@holly_cummins
build steps
+
build items
extensible builds
any extension can make
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@holly_cummins
#Quarkus #RedHat
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@holly_cummins
#Quarkus #RedHat
build steps
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@holly_cummins
#Quarkus #RedHat
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@holly_cummins
#Quarkus #RedHat
build items
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@holly_cummins
#Quarkus #RedHat
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@holly_cummins
#Quarkus #RedHat
framework automatically
determines correct execution
order and injects parameters
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@holly_cummins
#Quarkus #RedHat
build items are communication
mechanism between build steps
framework automatically
determines correct execution
order and injects parameters
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@holly_cummins
isn’t long compilation kind of
terrible for developers?
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@holly_cummins
isn’t long compilation kind of
terrible for developers?
not if you have live coding :)
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@holly_cummins
framework works out required level of reload
live coding
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@holly_cummins
file reload
live coding
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@holly_cummins
file reload
live coding
SASS changes detected, will rebuild: [META-INF/
resources/public/stylesheets/live.scss]
Files changed but restart not needed - notified
extensions in: 0.043s
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@holly_cummins
file reload JVM agent reload
live coding
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@holly_cummins
file reload JVM agent reload
live coding
Application restart not required, replacing classes via
instrumentation
Live reload performed via instrumentation, no restart
needed, total time: 0.180s
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@holly_cummins
full restart
file reload JVM agent reload
live coding
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@holly_cummins
full restart
file reload JVM agent reload
live coding
Restarting Quarkus due to changes in
Application$RenardeRequest.class, Application.class,
Application$ApplicationGlobals.class,
Application$Templates.class.
Live reload total time: 1.415s
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@holly_cummins
full restart
file reload JVM agent reload
not noticeable
(Quarkus starts fast)
live coding
Restarting Quarkus due to changes in
Application$RenardeRequest.class, Application.class,
Application$ApplicationGlobals.class,
Application$Templates.class.
Live reload total time: 1.415s
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@holly_cummins
fast start enables live coding
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@holly_cummins
the most expensive resource: humans
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@holly_cummins
how to make people efficient
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@holly_cummins
how to make people efficient
- make it hard to get wrong
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@holly_cummins
how to make people efficient
- make it hard to get wrong
- strong typing
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@holly_cummins
how to make people efficient
- make it hard to get wrong
- strong typing
- garbage collection
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@holly_cummins
how to make people efficient
- make it hard to get wrong
- strong typing
- garbage collection
- give them a tight feedback loop
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@holly_cummins
how to make people efficient
- make it hard to get wrong
- strong typing
- garbage collection
- give them a tight feedback loop
- for manual testing
- for automated testing
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@holly_cummins
how to make people efficient
- make it hard to get wrong
- strong typing
- garbage collection
- give them a tight feedback loop
- for manual testing
- for automated testing
- allow less typing
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@holly_cummins
how to make people efficient
- make it hard to get wrong
- strong typing
- garbage collection
- give them a tight feedback loop
- for manual testing
- for automated testing
- allow less typing
thank you, Java
- strong typing
- garbage collection
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@holly_cummins
how to make people efficient
- make it hard to get wrong
- strong typing
- garbage collection
- give them a tight feedback loop
- for manual testing
- for automated testing
- allow less typing
thank you, Java
- strong typing
- garbage collection
we just covered this
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@holly_cummins
developer joy
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@holly_cummins
ssssshhhhhhhh! it’s a secret!
index, index, index
(and let your ecosystem use the index)
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@holly_cummins
most frameworks need to…
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@holly_cummins
most frameworks need to…
-find all classes + interfaces +
methods + fields annotated with @X
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@holly_cummins
most frameworks need to…
-find all classes + interfaces +
methods + fields annotated with @X
-find all classes implementing or
extending X
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@holly_cummins
most frameworks need to…
-find all classes + interfaces +
methods + fields annotated with @X
-find all classes implementing or
extending X
Java doesn’t help us
nothing in the reflection package does this
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@holly_cummins
Jandex
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@holly_cummins
Jandex
“offline reflection”
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@holly_cummins
we have an index
now what?
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@holly_cummins
challenge assumptions.
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@holly_cummins
challenge assumptions.
what if developers
didn’t have to … ?
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@holly_cummins
#RedHat
package com.example;
import org.jboss.logging.Logger;
public class Thing {
private static final Logger log = Logger.getLogger(Thing.class);
public void doSomething() {
log.info("It works!");
}
}
example: logging
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@holly_cummins
#RedHat
package com.example;
import org.jboss.logging.Logger;
public class Thing {
private static final Logger log = Logger.getLogger(Thing.class);
public void doSomething() {
log.info("It works!");
}
}
example: logging
import io.quarkus.logging.Log;
Log
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@holly_cummins
ssssshhhhhhhh! it’s a secret!
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@holly_cummins
ssssshhhhhhhh! it’s a secret!
don’t make humans tell
the computer what the
computer already knows
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@holly_cummins
“but isn’t that dynamism expensive?”
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@holly_cummins
no.
“but isn’t that dynamism expensive?”
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@holly_cummins
no.
- use Jandex to find use-sites of the Log class
“but isn’t that dynamism expensive?”
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@holly_cummins
no.
- use Jandex to find use-sites of the Log class
- inject a static logger field $logger
“but isn’t that dynamism expensive?”
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@holly_cummins
no.
- use Jandex to find use-sites of the Log class
- inject a static logger field $logger
- replace all calls of Log.method with calls to $logger.method
“but isn’t that dynamism expensive?”
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@holly_cummins
no.
- use Jandex to find use-sites of the Log class
- inject a static logger field $logger
- replace all calls of Log.method with calls to $logger.method
… all at build time
“but isn’t that dynamism expensive?”
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@holly_cummins
logging: compiled version
public class MyService {
// injected
private static final Logger $logger = Logger.getLogger(Thing.class)
public void doSomething() {
$logger.info(“It works!”);
}
}
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@holly_cummins
what if…
you could inherit boilerplate
Hibernate queries from a superclass,
instead of having to write them all?
example: hibernate
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@holly_cummins
#RedHat
@ApplicationScoped
public class GreetingRepository {
public Entity findByName(int name) {
return find("name", name).firstResult();
}
void persist(Entity entity) {}
void delete(Entity entity) {}
Entity findById(Id id) {}
List list(String query, Sort sort, Object... params) {
return null;
}
Stream stream(String query, Object... params) {
return null;
}
long count() {
return 0;
}
long count(String query, Object... params) {
return 0;
}
}
example: hibernate with panache
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@holly_cummins
#RedHat
example: hibernate with panache
@ApplicationScoped
public class GreetingRepository implements PanacheRepository {
public Entity findByName(int name) {
return find("name", name).firstResult();
}
}
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@holly_cummins
#RedHat
DAO
example: hibernate with panache
@ApplicationScoped
public class GreetingRepository implements PanacheRepository {
public Entity findByName(int name) {
return find("name", name).firstResult();
}
}
repository pattern
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@holly_cummins
#RedHat
example: hibernate with panache
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@holly_cummins
#RedHat
example: hibernate with panache
active record pattern
@Entity
public class Greeting extends PanacheEntity {
public String name;
public LocalDate issued;
@Version
public int version;
public static List getTodaysGreetings() {
return list("date", LocalDate.now());
}
}
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@holly_cummins
why was this even hard?
public class PanacheEntity {
public static List listAll()
{
// but… how do we know which entity to query?
throw new UnobtainiumException();
}
}
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@holly_cummins
why was this even hard?
public class PanacheEntity {
public static List listAll()
{
// but… how do we know which entity to query?
throw new UnobtainiumException();
}
}
signature can be generic
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@holly_cummins
why was this even hard?
public class PanacheEntity {
public static List listAll()
{
// but… how do we know which entity to query?
throw new UnobtainiumException();
}
}
implementation cannot be generic
signature can be generic
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@holly_cummins
here’s what we do
@Entity
public class Order extends PanacheEntity {
// … original class
// injected in the bytecode
// we add a Order.listAll method
public static List listAll() {
return DbOperations.listAll(Order.class);
}
}
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@holly_cummins
machine efficiency unlocked human efficiency
we broke the tradeoff
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@holly_cummins #RedHat
but magic
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@holly_cummins #RedHat
magic
should always be optional
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@holly_cummins #RedHat
doing less is efficient
fighting bad magic is not efficient
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@holly_cummins
optimise for real use, not demo-ware
real efficiency
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@holly_cummins
ssssshhhhhhhh! it’s a secret!
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@holly_cummins
ssssshhhhhhhh! it’s a secret!
be reactive to go faster,
but don’t make humans
do reactive programming
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@holly_cummins
quarkus has a reactive core
it’s well-hidden :)
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@holly_cummins
what is the common factor behind our
performance improvements?
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@holly_cummins
developer-zero on Quarkus
redesigned Hibernate to “boot in advance”
what is the common factor behind our performance improvements?
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@holly_cummins
hyper-focussed performance engineer
delivers big fixes to many open source Java projects
what is the common factor behind our performance improvements?
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@holly_cummins
what is the common factor behind our performance improvements?
working on neighbouring projects
big improvement to efficiency of Jackson with virtual threads
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@holly_cummins
what is the common factor behind our performance improvements?
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@holly_cummins
what is the common factor behind our performance improvements?
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@holly_cummins #RedHat
A lot of clever people made Quarkus so efficient.
Only some of them were Italian.
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@holly_cummins #RedHat
> 1000 clever people made Quarkus so efficient.
Only some of them were Italian.
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@holly_cummins #RedHat
Emiliia Nesterovych
Emmanuel Bernard
Emre Kaplan
Enrique gonzález Martínez
Enrique Mingorance Cano
Eoin Gallinagh
Eric Deandrea
Eric Wittmann
Erik Åsén
Erik Mattheis
Erin Schnabel
Eugene Berman
Evan Shortiss
Fabricio Gregorio
faculbsz
Falko Modler
Fedor Dudinskiy
Felipe Carvalho dos Anjos Formentin
Felipe Henrique Gross Windmoller
Fernando Comunello
Fernando Henrique
fhavel
Fikru Mengesha
Filippe Spolti
Florian Beutel
Florian Bütler
Florian Heubeck
Florin Botis
Foivos Zakkak
Foobartender
Fouad Almalki
Francesco Nigro
Francisco Javier Tirado Sarti
Francois Steyn
Frank Eichfelder
franz1981
freakse-sa
Fred Bricon
Frédérc Blanc
Freeman Fang
Fu Cheng
Gabriele Cardosi
Galder Zamarreño
galiacheng
Gavin King
Gavin Ray
Geert Schuring
Geoffrey De Smet
Geoffrey GREBERT
Georg Leber
George Gastaldi
manofthepeace
Manyanda Chitimbo
Marat Gubaidullin
Marc Nuri
Marc Schlegel
Marc Wrobel
Marcel Hanser
Marcel Lohmann
Marcell Cruz
Marcelo Pereira
Marcin Czeczko
Marcin Kłopotek
Marco Bungart
Marco Schaub
Marco Yeung
Marco Zanghì
Marcus Paulo
Marek goldmann
Marek Skacelik
Marián Macik
Mario Fusco
MarioHNogueira
Mark Lambert
Mark Little
Mark McLaughlin
Mark Sailes
marko-bekhta
Markus Heberling
Markus Himmel
Markus Schwer
Martin C. Richards
Martin Grammelspacher
Martin Kouba
Martin Muzikar
Martin Panzer
Martin Weiler
martin-kofoed-jyskebank-dk
MartinWitt
Marvin B. Lillehaug
masini
Matej Novotny
Matej Vasek
Matheus Cruz
Mathias Holzer
Matteo Mortari
Matthias Andreas Benkard
Matthias Cullmann
mauroal
Max Andersen
Max Gabrielsson
Max Rydahl Andersen
Victor Hugo de Oliveira Molinar
Vincent Sevel
Vincent van Dam
Vinícius Ferraz Campos Florentino
Viswa Teja Nariboina
Vladimir Konkov
Vojtech Juranek
Vratislav Hais
w.glanzer
Walter Medvedeo
Wayne Ellis
Werner Glanzer
Willem Jan Glerum
William Antônio Siqueira
Wim goeman
Wippermueller, Frank
wojciech.stryjewski
Xavier
Xieshen
xstefank
Y. Luis
Yann-Thomas LE MOIGNE
Yannick Reifschneider
YassinHajaj
Yelzhas Suleimenov
yesunch9
Yoann Rodière
Yoshikazu Nojima
Youngmin Koo
Yubao Liu
yugoccp
Yukihiro Okada
Zaheed Beita
zanmagerl
zedbeit
Zheng Feng
Žiga Deisinger
Zineb Bendhiba
zohar
Zoran Regvart
Шумов Игорь Юрьевич
出
门
三不惹
> 1000 clever people made Quarkus so efficient.
Only some of them were Italian.
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@holly_cummins
Ok, you don’t have to be Italian.
But you do have to try really hard.
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@holly_cummins
this is not easy stuff
Franz
the problem
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@holly_cummins
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@holly_cummins
profile shave
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@holly_cummins
profile shave
shave
profile
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@holly_cummins
profile shave
shave
profile
shave
profile
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@holly_cummins
profile shave
shave
profile
shave
profile
shave
profile
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@holly_cummins
profile shave
shave
profile
shave
profile
shave
profile
shave
profile
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@holly_cummins
profile shave
shave
profile
shave
profile
shave
profile
shave
profile
shave
profile
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@holly_cummins
“OAAS: obsession as a service”
- Francesco Nigro
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small number of cores
Netty http handling
example: type pollution
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lots of cores
Netty http handling
example: type pollution
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what’s going on here?
lots of cores
example: type pollution
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@holly_cummins
to find out,
Francesco Nigro and Andrew Haley read
20,000 lines
of ASM
ASM
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@holly_cummins
if (a instanceof Thing)
problematic pattern:
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@holly_cummins
if (a instanceof Thing)
problematic pattern:
!!
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@holly_cummins
if (a instanceof Thing)
problematic pattern:
affects : !!
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@holly_cummins
if (a instanceof Thing)
– Quarkus core
– Netty
– Hibernate ORM
– Hibernate Reactive
– Vert.x
– Smallrye Mutiny
– Smallrye Common
– Vert.x Web
– Infinispan
– Camel
– Drools
– Optaplanner
– Java Class Library
problematic pattern:
affects : !!
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@holly_cummins
if (a instanceof Thing)
– Quarkus core
– Netty
– Hibernate ORM
– Hibernate Reactive
– Vert.x
– Smallrye Mutiny
– Smallrye Common
– Vert.x Web
– Infinispan
– Camel
– Drools
– Optaplanner
– Java Class Library
problematic pattern:
affects : !!
– Java Class Library!
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@holly_cummins
avoiding the problematic pattern sped Quarkus up a lot
(in many-core case)
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@holly_cummins #RedHat
private static int extractSize(Object it) {
if (it instanceof Collection) {
return ((Collection>) it).size();
} else if (it instanceof Map) {
return ((Map, ?>) it).size();
} else if (it.getClass().isArray()) {
return Array.getLength(it);
} else if (it instanceof Integer) {
return ((Integer) it);
}
return 10;
}
slow on many-core systems
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@holly_cummins #RedHat
private static int extractSize(Object it) {
if (it instanceof Collection) {
return ((Collection>) it).size();
} else if (it instanceof Map) {
return ((Map, ?>) it).size();
} else if (it.getClass().isArray()) {
return Array.getLength(it);
} else if (it instanceof Integer) {
return ((Integer) it);
}
return 10;
}
// Note that we intentionally use "instanceof" to test interfaces as the last resort in order to mitigate the "type pollution”
// See https://github.com/RedHatPerf/type-pollution-agent for more information
if (it instanceof AbstractCollection) {
return ((AbstractCollection>) it).size();
} else if (it instanceof AbstractMap) {
return ((AbstractMap, ?>) it).size();
} else if (it instanceof Collection) {
return ((Collection>) it).size();
} else if (it instanceof Map) {
return ((Map, ?>) it).size();
}
return 10;
}
slow on many-core systems
30% more throughput
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@holly_cummins #RedHat
private static int extractSize(Object it) {
if (it instanceof Collection) {
return ((Collection>) it).size();
} else if (it instanceof Map) {
return ((Map, ?>) it).size();
} else if (it.getClass().isArray()) {
return Array.getLength(it);
} else if (it instanceof Integer) {
return ((Integer) it);
}
return 10;
}
// Note that we intentionally use "instanceof" to test interfaces as the last resort in order to mitigate the "type pollution”
// See https://github.com/RedHatPerf/type-pollution-agent for more information
if (it instanceof AbstractCollection) {
return ((AbstractCollection>) it).size();
} else if (it instanceof AbstractMap) {
return ((AbstractMap, ?>) it).size();
} else if (it instanceof Collection) {
return ((Collection>) it).size();
} else if (it instanceof Map) {
return ((Map, ?>) it).size();
}
return 10;
} but …
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@holly_cummins #RedHat
private static int extractSize(Object it) {
if (it instanceof Collection) {
return ((Collection>) it).size();
} else if (it instanceof Map) {
return ((Map, ?>) it).size();
} else if (it.getClass().isArray()) {
return Array.getLength(it);
} else if (it instanceof Integer) {
return ((Integer) it);
}
return 10;
}
// Note that we intentionally use "instanceof" to test interfaces as the last resort in order to mitigate the "type pollution”
// See https://github.com/RedHatPerf/type-pollution-agent for more information
if (it instanceof AbstractCollection) {
return ((AbstractCollection>) it).size();
} else if (it instanceof AbstractMap) {
return ((AbstractMap, ?>) it).size();
} else if (it instanceof Collection) {
return ((Collection>) it).size();
} else if (it instanceof Map) {
return ((Map, ?>) it).size();
}
return 10;
} but …
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@holly_cummins #RedHat
private static int extractSize(Object it) {
if (it instanceof Collection) {
return ((Collection>) it).size();
} else if (it instanceof Map) {
return ((Map, ?>) it).size();
} else if (it.getClass().isArray()) {
return Array.getLength(it);
} else if (it instanceof Integer) {
return ((Integer) it);
}
return 10;
}
// Note that we intentionally use "instanceof" to test interfaces as the last resort in order to mitigate the "type pollution”
// See https://github.com/RedHatPerf/type-pollution-agent for more information
if (it instanceof AbstractCollection) {
return ((AbstractCollection>) it).size();
} else if (it instanceof AbstractMap) {
return ((AbstractMap, ?>) it).size();
} else if (it instanceof Collection) {
return ((Collection>) it).size();
} else if (it instanceof Map) {
return ((Map, ?>) it).size();
}
return 10;
}
not a fan of the fix
but …
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@holly_cummins #RedHat
private static int extractSize(Object it) {
if (it instanceof Collection) {
return ((Collection>) it).size();
} else if (it instanceof Map) {
return ((Map, ?>) it).size();
} else if (it.getClass().isArray()) {
return Array.getLength(it);
} else if (it instanceof Integer) {
return ((Integer) it);
}
return 10;
}
// Note that we intentionally use "instanceof" to test interfaces as the last resort in order to mitigate the "type pollution”
// See https://github.com/RedHatPerf/type-pollution-agent for more information
if (it instanceof AbstractCollection) {
return ((AbstractCollection>) it).size();
} else if (it instanceof AbstractMap) {
return ((AbstractMap, ?>) it).size();
} else if (it instanceof Collection) {
return ((Collection>) it).size();
} else if (it instanceof Map) {
return ((Map, ?>) it).size();
}
return 10;
}
not a fan of the fix
non-idiomatic
but …
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@holly_cummins #RedHat
private static int extractSize(Object it) {
if (it instanceof Collection) {
return ((Collection>) it).size();
} else if (it instanceof Map) {
return ((Map, ?>) it).size();
} else if (it.getClass().isArray()) {
return Array.getLength(it);
} else if (it instanceof Integer) {
return ((Integer) it);
}
return 10;
}
// Note that we intentionally use "instanceof" to test interfaces as the last resort in order to mitigate the "type pollution”
// See https://github.com/RedHatPerf/type-pollution-agent for more information
if (it instanceof AbstractCollection) {
return ((AbstractCollection>) it).size();
} else if (it instanceof AbstractMap) {
return ((AbstractMap, ?>) it).size();
} else if (it instanceof Collection) {
return ((Collection>) it).size();
} else if (it instanceof Map) {
return ((Map, ?>) it).size();
}
return 10;
}
not a fan of the fix
non-idiomatic
difficult to maintain
but …
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@holly_cummins #RedHat
private static int extractSize(Object it) {
if (it instanceof Collection) {
return ((Collection>) it).size();
} else if (it instanceof Map) {
return ((Map, ?>) it).size();
} else if (it.getClass().isArray()) {
return Array.getLength(it);
} else if (it instanceof Integer) {
return ((Integer) it);
}
return 10;
}
// Note that we intentionally use "instanceof" to test interfaces as the last resort in order to mitigate the "type pollution”
// See https://github.com/RedHatPerf/type-pollution-agent for more information
if (it instanceof AbstractCollection) {
return ((AbstractCollection>) it).size();
} else if (it instanceof AbstractMap) {
return ((AbstractMap, ?>) it).size();
} else if (it instanceof Collection) {
return ((Collection>) it).size();
} else if (it instanceof Map) {
return ((Map, ?>) it).size();
}
return 10;
}
not a fan of the fix
non-idiomatic
difficult to maintain
machine
efficiency
my team’s
efficiency
but …
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@holly_cummins #RedHat
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@holly_cummins #RedHat
the quarkus team write reactive code
so you don’t have to
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@holly_cummins #RedHat
the quarkus team write reactive code
so you don’t have to
the quarkus team work around the
type pollution bug so you don’t have to
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@holly_cummins #RedHat
efficiency isn’t a
one-time activity
beware creeping
performance deterioration
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@holly_cummins #RedHat
a statistics story: how we missed regressions
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@holly_cummins #RedHat
a statistics story: how we missed regressions
is performance getting
better or worse here?
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@holly_cummins #RedHat
a statistics story: how we missed regressions
is performance getting
better or worse here?
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@holly_cummins #RedHat
a statistics story: how we missed regressions
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@holly_cummins #RedHat
a statistics story: how we missed regressions
a parametric change-detection algorithm
meant this big regression masked other,
smaller, regressions
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@holly_cummins #RedHat
a story: how we fixed regressions
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@holly_cummins #RedHat
a story: how we fixed regressions
Roberto undid two years of
creep in one release
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@holly_cummins #RedHat
challenge assumptions
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@holly_cummins #RedHat
string comparison: who says you
have to read strings left-to-right?
challenge assumptions
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@holly_cummins #RedHat
string comparison: who says you
have to read strings left-to-right?
QUARKUS_REPEATED_PREFIX_FOO
QUARKUS_REPEATED_PREFIX_BAR
challenge assumptions
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@holly_cummins #RedHat
string comparison: who says you
have to read strings left-to-right?
QUARKUS_REPEATED_PREFIX_FOO
QUARKUS_REPEATED_PREFIX_BAR
challenge assumptions
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@holly_cummins
ssssshhhhhhhh! it’s a secret!
invest in your own
Francesco
(being Italian is optional)
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@holly_cummins
one last trade-off
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@holly_cummins
sustainability
saving planet
doing stuff we
want to do
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@holly_cummins
sustainability
saving planet
doing stuff we
want to do
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@holly_cummins
the vrroooom model gives hope
but …
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@holly_cummins
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@holly_cummins
invented by Dr. Vroom
(really!)
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@holly_cummins
naming is the hardest problem in computer science
invented by Dr. Vroom
(really!)
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@holly_cummins
naming is the hardest problem in computer science
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@holly_cummins
my vrroooom model
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No content
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@holly_cummins
#RedHat
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@holly_cummins
#RedHat
these two columns
are almost the same
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@holly_cummins
#RedHat
Energy
1
10
100
Time
1 10 100
energy efficiency across programming languages
Python
Rust
Java
Go
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@holly_cummins
#RedHat
Energy
1
10
100
Time
1 10 100
the trend line is more
or less straight
energy efficiency across programming languages
Python
Rust
Java
Go
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@holly_cummins #RedHat
capacity
Source: John O’Hara
Setup:
• REST + CRUD
• large heap
• RAPL energy measurement
Assumptions:
climate impact at low load (single instance)
lower is better
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@holly_cummins #RedHat
capacity
Source: John O’Hara
Setup:
• REST + CRUD
• large heap
• RAPL energy measurement
Assumptions:
climate impact at low load (single instance)
line length shows max throughput
lower is better
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@holly_cummins #RedHat
capacity
Source: John O’Hara
Setup:
• REST + CRUD
• large heap
• RAPL energy measurement
Assumptions:
climate impact at low load (single instance)
Quarkus on JVM has the lowest carbon …
because it has the highest throughput
line length shows max throughput
lower is better
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@holly_cummins #RedHat
saving planet
coding how we
wanna code
we beat the tradeoff
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@holly_cummins #RedHat
saving planet
coding how we
wanna code
we beat the tradeoff
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@holly_cummins
machine efficiency helps us gain human efficiency
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@holly_cummins
efficient
languages
(too long; didn’t pay attention)
tl;dpa
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@holly_cummins
efficient
languages
machine efficiency
human efficiency
(too long; didn’t pay attention)
tl;dpa
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@holly_cummins
efficient
languages
machine efficiency
human efficiency
(too long; didn’t pay attention)
tl;dpa challenge assumptions
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@holly_cummins
efficient
languages
machine efficiency
human efficiency
(too long; didn’t pay attention)
tl;dpa challenge assumptions
only do work once
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@holly_cummins
efficient
languages
machine efficiency
human efficiency
(too long; didn’t pay attention)
tl;dpa challenge assumptions
only do work once
move work to where it hurts least
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@holly_cummins
efficient
languages
machine efficiency
human efficiency
(too long; didn’t pay attention)
tl;dpa challenge assumptions
only do work once
move work to where it hurts least
index, index, index
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@holly_cummins
efficient
languages
machine efficiency
human efficiency
(too long; didn’t pay attention)
tl;dpa challenge assumptions
only do work once
move work to where it hurts least
index, index, index
efficiency needs continued investment
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@holly_cummins
efficient
languages
machine efficiency
human efficiency
(too long; didn’t pay attention)
tl;dpa challenge assumptions
challenge assumptions
only do work once
move work to where it hurts least
index, index, index
efficiency needs continued investment
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@holly_cummins
efficient
languages
machine efficiency
human efficiency
(too long; didn’t pay attention)
tl;dpa challenge assumptions
challenge assumptions
tighten feedback loops
only do work once
move work to where it hurts least
index, index, index
efficiency needs continued investment
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@holly_cummins
efficient
languages
machine efficiency
human efficiency
(too long; didn’t pay attention)
tl;dpa challenge assumptions
challenge assumptions
tighten feedback loops
only do work once
move work to where it hurts least
index, index, index
efficiency needs continued investment
don’t make humans tell the computer
what the computer already knows
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@holly_cummins
https://hollycummins.com/quarkus-efficiency-devoxx/
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