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Slide 1
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These are slides, not a paper.
You’! need to watch the talk
to understand the context.
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Eve
Working around evolution.
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steve{@(stevelosh}.com)
{twitter} (website)
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200,000 BCE 2012 CE
(modern humans evolved) (present day)
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Eat
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Reproduce
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Don’t Die
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Natural
Selection
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Eyes
Subconscious
Brain
Conscious
Brain
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LOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSDIRTLOTS
OFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSL
OTSOFGRASSLOTSOFGRASSLOTSOFGRASSDIRTLOTSOFGRASSLOTSOFGRASSLOTSO
FGRASSLOTSOFGRASSLOTSOFGRASSDIRTLOTSOFGRASSLOTSOFGRASSLOTSOFGRA
SSYGRASSLOTSOFGRASSDIRTLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFG
RASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSDIRTLOTSOFGRASS
LOTSOFGRASSLOTSOFGRASSLOTSOFGRASSSMALLTREELOTSOFGRASSDIRTLOTSOF
GRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOT
SOFGRASSDIRTLOTSOFGRASSLOTSOFGRASSLOTSANDLOTSOFGRASSLOTSOFGRASS
LOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGR
ASSLOTSOFGRASSDIRTLOTSOFGRASSLOTSOFGRASSDIRTLOTSOFGRASSDIRTLOTS
OFGRASSANDDIRTLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSO
FGRASSLOTSOFGRASSDIRTLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRA
SSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSYGRASSLOTSOFGRASSDIRTLOTSOFG
RASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSDIRTLOTSOFGRASS
LOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGR
ASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLIONLOTSOFGRASSL
OTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSDIRTLOTSO
FGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLO
TSOFGRASSDIRTLOTSOFGRASSLOTSOFGRASSSOMUCHGRASSLOTSOFGRASSDIRTDI
RTLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSDIRTLOTSOFGRASSLO
TSOFGRASSLOTSOFDIRTLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASS
LOTSOFGRASSLOTSOFGRASSDIRTLOTSOFGRASSLOTSOFGRASSDIRTLOTSOFGRASS
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LOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSDIRTLOTS
OFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSL
OTSOFGRASSLOTSOFGRASSLOTSOFGRASSDIRTLOTSOFGRASSLOTSOFGRASSLOTSO
FGRASSLOTSOFGRASSLOTSOFGRASSDIRTLOTSOFGRASSLOTSOFGRASSLOTSOFGRA
SSYGRASSLOTSOFGRASSDIRTLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFG
RASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSDIRTLOTSOFGRASS
LOTSOFGRASSLOTSOFGRASSLOTSOFGRASSSMALLTREELOTSOFGRASSDIRTLOTSOF
GRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOT
SOFGRASSDIRTLOTSOFGRASSLOTSOFGRASSLOTSANDLOTSOFGRASSLOTSOFGRASS
LOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGR
ASSLOTSOFGRASSDIRTLOTSOFGRASSLOTSOFGRASSDIRTLOTSOFGRASSDIRTLOTS
OFGRASSANDDIRTLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSO
FGRASSLOTSOFGRASSDIRTLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRA
SSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSYGRASSLOTSOFGRASSDIRTLOTSOFG
RASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSDIRTLOTSOFGRASS
LOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGR
ASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLIONLOTSOFGRASSL
OTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSDIRTLOTSO
FGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLO
TSOFGRASSDIRTLOTSOFGRASSLOTSOFGRASSSOMUCHGRASSLOTSOFGRASSDIRTDI
RTLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSDIRTLOTSOFGRASSLO
TSOFGRASSLOTSOFDIRTLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASS
LOTSOFGRASSLOTSOFGRASSDIRTLOTSOFGRASSLOTSOFGRASSDIRTLOTSOFGRASS
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LOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSDIRTLOTS
OFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSL
OTSOFGRASSLOTSOFGRASSLOTSOFGRASSDIRTLOTSOFGRASSLOTSOFGRASSLOTSO
FGRASSLOTSOFGRASSLOTSOFGRASSDIRTLOTSOFGRASSLOTSOFGRASSLOTSOFGRA
SSYGRASSLOTSOFGRASSDIRTLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFG
RASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSDIRTLOTSOFGRASS
LOTSOFGRASSLOTSOFGRASSLOTSOFGRASSSMALLTREELOTSOFGRASSDIRTLOTSOF
GRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOT
SOFGRASSDIRTLOTSOFGRASSLOTSOFGRASSLOTSANDLOTSOFGRASSLOTSOFGRASS
LOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGR
ASSLOTSOFGRASSDIRTLOTSOFGRASSLOTSOFGRASSDIRTLOTSOFGRASSDIRTLOTS
OFGRASSANDDIRTLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSO
FGRASSLOTSOFGRASSDIRTLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRA
SSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSYGRASSLOTSOFGRASSDIRTLOTSOFG
RASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSDIRTLOTSOFGRASS
LOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGR
ASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLIONLOTSOFGRASSL
OTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSDIRTLOTSO
FGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLO
TSOFGRASSDIRTLOTSOFGRASSLOTSOFGRASSSOMUCHGRASSLOTSOFGRASSDIRTDI
RTLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSDIRTLOTSOFGRASSLO
TSOFGRASSLOTSOFDIRTLOTSOFGRASSLOTSOFGRASSLOTSOFGRASSLOTSOFGRASS
LOTSOFGRASSLOTSOFGRASSDIRTLOTSOFGRASSLOTSOFGRASSDIRTLOTSOFGRASS
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GRASS
TREE
LION
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Small numbers
of
medium-sized things
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Small numbers
“Fewer than ten”
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Medium-sized things
“Bigger than a child,
smaller than an
elephant”
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Agriculture!
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Large numbers
of
tiny and/or enormous
things
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“Two million rows
in the database”
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“One hundred
milliseconds to serve
an HTTP request”
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“65,536 blocks in a
Minecra$ chunk”
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We are not alone!
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“10 to 100 trillion
ce!s in the human body”
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“9.2 × 1037 proton-proton
chain reactions per second
in the sun”
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Math & Science
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Reason
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Abstractions
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Large numbers
of things
Small numbers
of things
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Logic
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Abstractions
New
Abstractions
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Abstractions
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Small number
of abstractions
Many things in
the real world
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No content
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Pythagoras
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a2 + b2 = c2
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a
b
c
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a
b
c
a2
b2
c2
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=
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Eve
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“The ancestor of every
living human on Earth”
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200,000 BCE 2012 CE
(modern humans evolved) (present day)
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Reason
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No content
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No content
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Generations Ago Ancestors
1 2
2 4
3 8
4 16
5 32
6 64
7 128
8 256
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ancestors = 2generations
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ancestors = 2((2012 - year) / 20)
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(ns eve.core
(:use [incanter core io charts stats]))
(def world-population
(read-dataset
"https://raw.github.com/.../world-population.csv"
:header true))
(defn number-of-ancestors [x]
(let [years-ago (- 2012 x)
generations-ago (int (/ years-ago 20))]
(Math/pow 2 generations-ago)))
(doto (scatter-plot ($ :year world-population)
($ :population world-population)
:x-label "Year"
:y-label "People")
(add-function number-of-ancestors 500 2012)
(set-x-range 500 2012)
(set-y-range 0 1300000000)
view)
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No content
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200,000 BCE 2012 CE
(modern humans evolved) (present day)
1450 CE
(Eve?)
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Measurement
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Gather Data
and
Analyze it with
Statistics
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Learn!
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No content
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200,000 BCE 2012 CE
(modern humans evolved) (present day)
3,000 BCE
(Eve)
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Math and Science
work!
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How can we learn
from them?
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Reason
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Stop. Think.
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“You have to keep a dozen of your
favorite problems constantly present
in your mind, although by and large
they wi! lay in a dormant state.
Every time you hear or read a new
trick or a new result, test it against
each of your twelve problems to see
whether it helps.”
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Write Reasonable
Code
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Measurement
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Monitoring
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IN
PRODUCTION!
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Everyone who cares how fast Node.js
serves Fibonacci numbers on your laptop
You
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(defn get-account-type [cash]
(cond
(< cash 1000) :normal
(< cash 10000) :silver
:else :gold))
(time (dotimes [_ 1000] (get-account-type (rand 20000))))
"Elapsed time: 8.857 msecs"
(time (dotimes [_ 1000] (get-account-type (rand 20000))))
"Elapsed time: 5.255 msecs"
(time (dotimes [_ 1000] (get-account-type (rand 20000))))
"Elapsed time: 4.37 msecs"
(dotimes [_ 1000000] (get-account-type (rand 20000)))
(time (dotimes [_ 1000] (get-account-type (rand 20000))))
"Elapsed time: 0.476 msecs"
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Monitoring Tools
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IN
PRODUCTION
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Testing
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One Unit Test
equals
1 bit of information
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One Unit Test
equals
one of my assumptions is true
for one set of input
on one particular machine
at one particular point in time
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Generative Testing
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One Generative Test
equals
many bits of information
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One Generative Test
equals
one of my assumptions is true
for thousands of sets of input
on one particular machine
at one particular point in time
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Ape Brains
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Small numbers
of
medium-sized things
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Math &
Science
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Reason
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Measurement
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Overcome
Evolution
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Thanks!
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http://www.census.gov/ipc/www/worldhis.html
http://pivotallabs.com/talks/139-metrics-metrics-everywhere
http://www.infoq.com/presentations/Simple-Made-Easy
http://greenteapress.com/thinkstats/
http://en.wikipedia.org/wiki/Human_microbiome
http://en.wikipedia.org/wiki/Sun
http://tedlab.mit.edu/~dr/Papers/Rohde-MRCA-two.pdf
http://incanter.org/
http://www.khanacademy.org/
http://en.wikipedia.org/wiki/QuickCheck
http://github.com/clojure/test.generative
http://github.com/sjl/bacon-eve
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/sjl/eve
github.com
bitbucket.org
{ }
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Thanks!
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No content