Try JIT compiler for Ruby 2.6

Meguro.rb#13 で「Ruby の JIT を触ってみた話」をしました
cf. https://megurorb.connpass.com/event/82076/

Transcript

1. ©2018 Wantedly, Inc.
   Try JIT compiler
   for Ruby 2.6
   28.Mar.2018 - Nao Minami (@south37)
   

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2. ©2018 Wantedly, Inc.
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3. ©2018 Wantedly, Inc.
   Nao Minami / @south37, @minami7o
   Software engineer
   @ Wantedly, Inc.
   

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4. ©2018 Wantedly, Inc.
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5. ©2018 Wantedly, Inc.
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6. ©2018 Wantedly, Inc.
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7. ©2018 Wantedly, Inc.
   Vladimir ͞Μ͕࣮૷ͨ͠MJIT (JITج൫)
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   k0kubun ͞Μ͕࣮૷ͨ͠YARV-MJIT (JITDPNQJMFS)
   

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8. ©2018 Wantedly, Inc.
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9. ©2018 Wantedly, Inc.
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10. ©2018 Wantedly, Inc.
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12. ©2018 Wantedly, Inc.
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13. ©2018 Wantedly, Inc.
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14. ©2018 Wantedly, Inc.
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    $ rbenv install --list | grep 2.6
    1.8.6-p286
    1.9.3-p286
    2.2.6
    2.6.0-dev
    2.6.0-preview1
    rbx-2.2.6
    rbx-2.6
    $ rbenv install 2.6.0-preview1
    $ rbenv global 2.6.0-preview1
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15. ©2018 Wantedly, Inc.
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    def calculate(a, b, n = 40_000_000)
    n.times.count do
    a = a * 16807 % 2147483647
    b = b * 48271 % 2147483647
    (a & 0xffff) == (b & 0xffff)
    end
    end
    raise unless calculate(65, 8921) == 588
    p result: calculate(699, 124)
    

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16. ©2018 Wantedly, Inc.
    $ ruby tmp/bench.rb
    {:result=>600}
    ruby tmp/playing.rb 10.68s user 0.12s
    system 97% cpu 11.084 total
    $ ruby --disable-gems --jit tmp/bench.rb
    {:result=>600}
    ruby --disable-gems --jit tmp/playing.rb
    8.12s user 0.13s system 103% cpu 7.973 total
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19. ©2018 Wantedly, Inc.
    $ ruby --disable-gems --jit --jit-verbose=2 tmp/bench.rb
    MJIT: CC defaults to clang
    MJIT: tmp_dir is …
    Creating precompiled header
    Starting process: clang clang -w -O3 -emit-pch -o ….h.gch …/rb_mjit_min_header-2.6.0.h
    start compile: block in calculate@tmp/bench.rb:2 -> ….c
    Starting process: clang clang -dynamic -bundle -O3 -include-pch ….h.gch -o …/
    _ruby_mjit_p23579u0.bundle ….c -L…/lib -Wl,-undefined,dynamic_lookup -Wl,-
    multiply_defined,suppress
    JIT success (195.0ms): block in calculate@tmp/bench.rb:2 -> ….c
    {:result=>600}
    Canceling pch and worker threads
    Successful MJIT finish
    ruby --disable-gems --jit --jit-verbose=2 tmp/bench.rb 8.59s user 0.14s system 102% cpu
    8.480 total
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20. ©2018 Wantedly, Inc.
    $ ruby --disable-gems --jit --jit-verbose=2 tmp/bench.rb
    MJIT: CC defaults to clang
    MJIT: tmp_dir is …
    Creating precompiled header
    Starting process: clang clang -w -O3 -emit-pch -o ….h.gch …/rb_mjit_min_header-2.6.0.h
    start compile: block in calculate@tmp/bench.rb:2 -> ….c
    Starting process: clang clang -dynamic -bundle -O3 -include-pch ….h.gch -o …/
    _ruby_mjit_p23579u0.bundle ….c -L…/lib -Wl,-undefined,dynamic_lookup -Wl,-
    multiply_defined,suppress
    JIT success (195.0ms): block in calculate@tmp/bench.rb:2 -> ….c
    {:result=>600}
    Canceling pch and worker threads
    Successful MJIT finish
    ruby --disable-gems --jit --jit-verbose=2 tmp/bench.rb 8.59s user 0.14s system 102% cpu
    8.480 total
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21. ©2018 Wantedly, Inc.
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22. ©2018 Wantedly, Inc.
    $ ruby --jit --jit-verbose=2 tmp/bench.rb
    .
    .
    .
    .
    ruby --jit --jit-verbose=2 tmp/bench.rb 12.67s user 0.73s system 148% cpu 9.055 total
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