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The future of Ruby is faster Euruko 2013 Saturday, June 29, 13

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Dirkjan Bussink @dbussink Saturday, June 29, 13

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Rubinius Use Ruby Saturday, June 29, 13

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Saturday, June 29, 13

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Saturday, June 29, 13

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“Everything you heard about Ruby being slow is not true. It’s about twice as slow as that” Saturday, June 29, 13

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Saturday, June 29, 13

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The lure of the hash table Saturday, June 29, 13

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class MethodTable def initialize @methods = {} end def store_method(name, code) @methods[name] = code end def find_method(name) @methods[name] end end Saturday, June 29, 13

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class Address def initialize @instance_variables[:street] = "Pantheon" @instance_variables[:number] = 1 @instance_variables[:city] = "Athens" end end Saturday, June 29, 13

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Hash tables everywhere! Saturday, June 29, 13

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Inline caching Saturday, June 29, 13

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p = Person.new p.name Saturday, June 29, 13

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p = Person.new p.name Saturday, June 29, 13

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“There are 2 hard problems in computer science: caching, naming, and off-by-1 errors” Saturday, June 29, 13

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Global serial number Saturday, June 29, 13

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http://jamesgolick.com/2013/4/14/mris-method-caches.html https://charlie.bz/blog/things-that-clear-rubys-method-cache Saturday, June 29, 13

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Per class serial number Saturday, June 29, 13

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Probably in 2.1 Saturday, June 29, 13

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Instance variable packing Saturday, June 29, 13

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class Address def initialize @street = "Pantheon" @number = 1 @city = "Athens" end end Address.instance_variable_get("@seen_ivars") => [:@street, :@number, :@city] Saturday, June 29, 13

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0001: push_ivar :@number self[1] Removes hash table lookup Saturday, June 29, 13

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Just in time compilation Saturday, June 29, 13

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def method1 1 + method2 end def method2 2 + 1 end 100000.times do method1 end Saturday, June 29, 13

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def method1 1 + method2 end def method2 2 + 1 end 100000.times do method1 end ... 0x110ed90e7 mov $0x9, %eax 0x110ed90ec jmp 0x119 ; 0x110ed9129 ... 0x110ed9129 addq $0xa0, %rsp 0x110ed9130 pop %rbp 0x110ed9131 ret Saturday, June 29, 13

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def method1 1 + method2 end def method2 2 + 1 end 100000.times do method1 end ... 0x110ed90e7 mov $0x9, %eax 0x110ed90ec jmp 0x119 ; 0x110ed9129 ... 0x110ed9129 addq $0xa0, %rsp 0x110ed9130 pop %rbp 0x110ed9131 ret b0100 (4) b1000 (8) b1001 (9) Saturday, June 29, 13

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def method1 1 + method2 end def method2 2 + 1 end 100000.times do method1 end ... 0x110ed90e7 mov $0x9, %eax 0x110ed90ec jmp 0x119 ; 0x110ed9129 ... 0x110ed9129 addq $0xa0, %rsp 0x110ed9130 pop %rbp 0x110ed9131 ret b0100 (4) b1000 (8) b1001 (9) Saturday, June 29, 13

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Saturday, June 29, 13

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Creating less garbage Saturday, June 29, 13

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a = Address.new a.street = "Pantheon" a.number = "1" a.city = "Athens" Rubinius.memory_size(a) => 56 VS Rubinius.memory_size(a) => 160 Saturday, June 29, 13

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Saturday, June 29, 13

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2.1 Saturday, June 29, 13

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Auto tuning Saturday, June 29, 13

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Parallelism Saturday, June 29, 13

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Higher throughput Saturday, June 29, 13

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Concurrency Saturday, June 29, 13

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Shorter stop the world Saturday, June 29, 13

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thread 1 thread 2 thread 3 Saturday, June 29, 13

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thread 1 thread 2 thread 3 GC thread Saturday, June 29, 13

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thread 1 thread 2 thread 3 GC thread Long GC pauses be gone! Saturday, June 29, 13

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http://rubini.us/2013/06/22/concurrent-garbage-collection/ Saturday, June 29, 13

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How much does it help? Saturday, June 29, 13

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Before Saturday, June 29, 13

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Lifting the server siege... done. Transactions: 501 hits Response time: 0.02 secs Transaction rate: 51.70 trans/sec Throughput: 1.46 MB/sec Concurrency: 1.00 Longest transaction: 0.15 Shortest transaction: 0.01 Saturday, June 29, 13

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Lifting the server siege... done. Transactions: 501 hits Response time: 0.02 secs Transaction rate: 51.70 trans/sec Throughput: 1.46 MB/sec Concurrency: 1.00 Longest transaction: 0.15 Shortest transaction: 0.01 Sad long wait time :( Saturday, June 29, 13

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Lifting the server siege... done. Transactions: 1032 hits Response time: 0.04 secs Transaction rate: 102.79 trans/sec Throughput: 2.91 MB/sec Concurrency: 4.00 Longest transaction: 0.28 Shortest transaction: 0.02 Saturday, June 29, 13

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Lifting the server siege... done. Transactions: 1032 hits Response time: 0.04 secs Transaction rate: 102.79 trans/sec Throughput: 2.91 MB/sec Concurrency: 4.00 Longest transaction: 0.28 Shortest transaction: 0.02 Not so good concurrency Saturday, June 29, 13

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After Saturday, June 29, 13

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Lifting the server siege... done. Transactions: 599 hits Response time: 0.02 secs Transaction rate: 61.06 trans/sec Throughput: 1.73 MB/sec Concurrency: 1.00 Longest transaction: 0.03 Shortest transaction: 0.01 Saturday, June 29, 13

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Lifting the server siege... done. Transactions: 599 hits Response time: 0.02 secs Transaction rate: 61.06 trans/sec Throughput: 1.73 MB/sec Concurrency: 1.00 Longest transaction: 0.03 Shortest transaction: 0.01 No more long pause! Saturday, June 29, 13

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Lifting the server siege... done. Transactions: 1374 hits Response time: 0.02 secs Transaction rate: 176.38 trans/sec Throughput: 5.00 MB/sec Concurrency: 3.99 Longest transaction: 0.04 Shortest transaction: 0.01 Saturday, June 29, 13

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Lifting the server siege... done. Transactions: 1374 hits Response time: 0.02 secs Transaction rate: 176.38 trans/sec Throughput: 5.00 MB/sec Concurrency: 3.99 Longest transaction: 0.04 Shortest transaction: 0.01 More req/s! Saturday, June 29, 13

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1 client: 51 => 61 req/s 4 clients: 102 => 176 req/s Saturday, June 29, 13

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Concurrency & parallelism Saturday, June 29, 13

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No GIL/GVL! Saturday, June 29, 13

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Future is multi-core Saturday, June 29, 13

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We need new API’s Saturday, June 29, 13

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Parallel each Saturday, June 29, 13

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Thread safe collections Saturday, June 29, 13

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What about you as a developer? Saturday, June 29, 13

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Be nice Saturday, June 29, 13

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Write type stable code Saturday, June 29, 13

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Small and simple methods Saturday, June 29, 13

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Benchmark! Saturday, June 29, 13

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? Saturday, June 29, 13