Fast Code for Ruby - Speaker Deck

Fast Code for Ruby

by 秒速284km

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Fast Code for Ruby @284km

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͸͍͍͞ʂ

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ࠓ೔࿩͢͜ͱ Ruby Ͱ଎͍ίʔυΛॻ͘ benchmark_driver ͕͘͢͝ྑ͍ Ruby ͷָ͠ΈํΛͻͱͭ

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଎͍ίʔυΛॻ͘

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଎͍ίʔυΛॻ͘ ଌఆ ϕϯνϚʔΧʔ

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ϕϯνϚʔΧʔ benchmark.rb (ඪ४ఴ෇ϥΠϒϥϦ) evanphx/benchmark-ips k0kubun/benchmark_driver

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଎͍ίʔυ ಉ݁͡Ռ͕ಘΒΕΔෳ਺ͷॻ͖ํ ܭଌͯ͠ɺ଎͍΄͏͕଎͍ લఏ: ࠓճͷϕϯνϚʔΫ͸๻ͷ MBP Ͱ࣮ߦͨ͠΋ͷͰ͢

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benchmark_driver e.g. ෳ਺ͷॲཧܥ ग़ྗܗࣜ (.md Մ)

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Hash#keys.each Hash#each_key

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Hash#keys.each Hash#each_key

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଎͍ίʔυ ৚݅ʹґଘ͢Δ৔߹͕͋Δ ඞͣͦͷॻ͖ํ͕ྑ͍ͱ͸ݴ͑ͳ͍ έʔε͕͋Δ (e.g. gsub / tr)

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gsub tr

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gsub tr

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gsub tr

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gsub tr

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gsub tr

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gsub tr

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଎͍ίʔυ Ͳ͏͍͏࣌ʹ༗ޮ͔Λ஌ΔͱΑ͞ ͦ͏ ࣮૷Λ೷͘ͱ෼͔Δ͜ͱ͕͋Δ

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Bang method ഁյత / ඇഁյత ͳϝιουͷྫ ͜ͷ࣮૷͸ݟ΍͍͢ͱࢥ͍·͢

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Hash#merge Hash#merge! ͜͜Ͱ͸αϯϓϧίʔυ͸ͦ Ε΄ͲॏཁͰ͸ͳ͘ɺ

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Hash#merge Hash#merge! ͜͜Ͱ͸αϯϓϧίʔυ͸ͦ Ε΄ͲॏཁͰ͸ͳ͘ɺ ଎౓ࠩͷཧ༝Λ௥ͬͯΈΔ

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Hash#merge Hash#merge! dup ͨ͠΋ͷΛ౉ͯ݁͠ ՌΛฦ͍ͯ͠ΔͷͰͦͷ෼ ஗͍

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଎͞ ͱɺಡΈ΍͢͞

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each_with_index while

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each_with_index while

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ಡΈ΍͢͞େࣄ ಡΈ΍͢͞ͱ͸…(ޙͰ࿩୊ʹ͠·͢ ͕ yield / Proc#call ΋ͦ͏Ͱ͢ΑͶ) ࢓ࣄͰॻ͘ίʔυͰ͸ɺνʔϜͷࣄ ৘ͳͲʹΑͬͯԿ͕ಡΈ΍͍͔͢͸ม ΘΓͦ͏Ͱ͸͋Δʢ๻ͷײ૝

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Rubocop::Cop::Performance ύϑΥʔϚϯε͕վળ͞Εͦ͏ͳͱ ͜ΖΛࢦఠͯ͘͠ΕΔ ੩తղੳπʔϧʹཔΔ͜ͱ΋༗ޮ ͜ͷؒͻͱͭࢦఠ͞Ε·ͨ͠

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String#match String#match?

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String#match String#match?

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String#match String#match?

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String#match String#match? MatchData ΦϒδΣΫτ Λฦ͢ʢϚονͨ͠৔߹ʣ

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String#match String#match? MatchData ΦϒδΣΫτ Λฦ͢ʢϚονͨ͠৔߹ʣ rb_reg_match_p() ͸ɺ Ϛονͨ͠Β true ͠ͳ͚ Ε͹ false Λฦ͢ɻ

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Ruby 2.5 ࢖͍ͬͯ·͔͢ʁ όʔδϣϯΞοϓͱڞʹվળ͞ΕΔ ෦෼͸஌͓ͬͯ͘ͱศར

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unpack1 unpack.ﬁrst String#unpack1 ͸ 2.4 Ͱೖ ͬͨ

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unpack1 unpack.ﬁrst String#unpack1 ͸ 2.4 Ͱೖ ͬͨ

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yield Proc#call 2.5 Ͱ Proc#call ͕଎͘ ͳͬͨ

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yield Proc#call

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yield Proc#call

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࠷৽ͷ Ruby ஌ͬͯΔͱ࢓ࣄָ͕ʹͳͬͨΓ͢Δ ஌Δͱɺ௥͏ͷָ͕͘͠ͳΔϧʔϓ JIT Λ༗ޮʹ͢Δͱɺ݁ՌͷมΘΔ ϕϯνϚʔΫ΋͋Γͦ͏ (2.6.0)

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·ͱΊ ʹ;͐ʔͰʔͼΔ benchmark_driver ͕͘͢͝ྑ͍ Fast Code ͱ͍͏ Ruby ͷָ͠Έํ Ruby ͷ࣮૷Λ೷͍ͯΈΔ ೖΓޱͱͯ͠ͷϕϯνϚʔΫ΋ྑ͍