Rubyを30倍速くした話

Transcript

1. 3VCZΛഒ
   ଎ͨ͘͠࿩
2. ͓͓͍͔ͭ͠͞ @tsukasaoishi (Github) https://www.kaeruspoon.net
3. ޿ࠂ࡞ͬͯͶ
   ͋ɺҰिؒͰ
4. ཁ݅
   ɾαΠτͷݕࡧը໘ʹग़͢ 17ߴ
   ɾ෼Ҏ಺ʹ൓ө
   ɾ஗͘͠ͳ͍Ͱ
5. ޿ࠂΛग़͢৚݅
   ɾ݅ग़͢
   ɾݕࡧ৚݅ʹϚονͨ͠΋ͷ
   ɾϚον͠ͳ͔ͬͨΒݕࡧ৚݅Λ
   ɹΏΔͯ͘͠·ͨ୳͢
   ɾશવϚον͠ͳ͍৔߹͸࠷େͰ
   ɹճ୳͢͜ͱʹͳΔ
6. ͍࣋ͬͯΔ෢ث
   ɾݕࡧΤϯδϯͳ͠
   ɾ%#Ͱ4&-&$5
7. ࢼߦࡨޡͦͷ
   ;ͭ͏ʹຖճ4&-&$5
8. NT
   Y
   ճ
   
   NT
9. NT
   Y
   ճ
   
   NT
10. ࢼߦࡨޡͦͷ
    ͻͱͭͻͱͭͷ৚݅͝ͱʹ
    *%ͷू߹Λ࡞ͬͯ
    ੵू߹
11. QSFGT
    \
    UPLZP
    <
    
    
    >
    ^
    BSFBT
    \
    FCJTV
    <
    
    >
    ^
    HFOSFT
    \
    ZBLJOJLV
    <
    >
    DVSSZ
    <>
    ^
    ౦ژɺܙൺणɺΧϨʔ͕ݕࡧ৚݅ͩͬͨ৔߹
     QSFGT<UPLZP>
    
    BSFBT<FCJTV>
     QSFGT<UPLZP>
    
    BSFBT<FCJTV>
    
    HFOSFT<DVSSZ>
12. QSFGT
    \
    UPLZP
    <
    
    
    >
    ^
    BSFBT
    \
    FCJTV
    <
    
    >
    ^
    HFOSFT
    \
    ZBLJOJLV
    <
    >
    DVSSZ
    <>
    ^
    ౦ژɺܙൺणɺΧϨʔ͕ݕࡧ৚݅ͩͬͨ৔߹
     QSFGT<UPLZP>
    
    BSFBT<FCJTV>
     QSFGT<UPLZP>
    
    BSFBT<FCJTV>
    
    HFOSFT<DVSSZ> ݅਺͕݅ະຬʹͳͬͨ࣌ʹɺͻͱͭલͷू߹Λ࢖͏
13. ສ݅ͷू߹ݸͷੵ
    
    
14. Benchmark.realtime do m & m & m & m & m & m end
15. 4FU
16. m = Set.new(1..1_000_000)
17. 
18. "SSBZ
19. m = (1..1_000_000).to_a
20. 
22. ࠶ߟ
    ɾ੔਺ͷू߹͔͠ѻΘͳ͍
    ɾੵू߹ͱϏοτԋࢉ͸ࣅ͍ͯΔ
23. BCDE
    B
    
    C
    
    D
    
    E
    
24. QSFGT
    \
    UPLZP
    <
    
    
    >
    ^
    BSFBT
    \
    FCJTV
    <
    
    >
    ^
    HFOSFT
    \
    ZBLJOJLV
    <
    >
    DVSSZ
    <>
    ^
    QSFGT
    \
    UPLZP
    
    ^
    BSFBT
    \
    FCJTV
    
    ^
    HFOSFT
    \
    ZBLJOJLV
    
    DVSSZ
    
    ^
25. 
    
     Ϗοτԋࢉ͸ίϯϐϡʔλಘҙ
26.   ʙ ʙ
27. ʜ ਺ेສθϩ͕ଓ͘ ʜ
28. ʜ ਺ेສθϩ͕ଓ͘ ʜ ༿ϊʔυ;ͨͭͰදݱͰ͖Δ
29.  ʙ  ʙ
30.  ʙ  ʙ ༿ϊʔυ͕Ұக͠ͳ͍৔߹͸
    Ϗοτԋࢉࣗମෆཁ
31. 3VCZ͸$ݴޠͰॻ͔Ε͍ͯΔ
32. ͓Ε͸3VCZΛ΍ΊΔͧ
33. typedef struct _leaf_node { unsigned long offset; unsigned long data; } *leaf_node;
34. void Init_figure_set(void) { rb_cFigureSet = rb_define_class("FigureSet", rb_cObject); rb_define_alloc_func(rb_cFigureSet, t_allocate); rb_define_private_method(rb_cFigureSet, "initialize", t_initialize, -1); rb_define_method(rb_cFigureSet, "initialize_copy", t_initialize_copy, 1); rb_define_method(rb_cFigureSet, "add", t_add, 1); rb_define_method(rb_cFigureSet, "delete", t_delete, 1); rb_define_method(rb_cFigureSet, "intersection", t_intersection, 1); ΠϯλʔϑΣʔε͸3VCZͩΑ
35. Benchmark.realtime do m & m & m & m & m & m end
36. 'JHVSF4FU
37. m = FigureSet.new((1..1_000_000).to_a)
38. 
40. require "figure_set" require "benchmark/ips" m3 = [] m5 = [] (1..1_000_000).each do |i| m3 << i if i % 3 == 0 m5 << i if i % 5 == 0 end s_m3 = Set.new(m3) s_m5 = Set.new(m5) f_m3 = FigureSet.new(m3) f_m5 = FigureSet.new(m5) Benchmark.ips do |x| x.report("arry") { m3 & m5 } x.report("set") { s_m3 & s_m5 } x.report("figure_set") { f_m3 & f_m5 } x.compare! end
41. figure_set: 1069.1 i/s arry: 31.1 i/s - 34.34x slower set: 13.6 i/s - 78.68x slower
42. ͓͠·͍