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஗ Ԇ ධ Ձ ͱ ݈ ߁ 2 0 1 6 - 1 0 - 1 6 O U C C LT ձ # 5 @susisu2413

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஗ Ԇ ධ Ձ Ͱ ύ ʔ α ί ϯ Ϗω ʔ λ Λ ޮ ཰ Խ ͠ ͨ ࿩ Λ ͠ · ͢

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ύ ʔ α ί ϯ Ϗω ʔ λ ʁ

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ߏ จ ղ ੳ ͢ Δ ΍ ͭ h t t p s : / / e n . w i k i p e d i a . o rg / w i k i / P a r s e r _ c o m b i n a t o r

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ೖ ྗ Τ ϥ ʔ ஋ ࢒ Γ ύʔα ύʔαΛؔ਺Ͱදݱ ʢ࣮༻্͸ΦϒδΣΫτͰϥοϓʣ

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ೖ ྗ Τ ϥ ʔ ஋ ࢒ Γ ύʔα ύ ʔ α ύ ʔ α ύʔα ίϯϏωʔλ ύʔαίϯϏωʔλͰΑΓෳࡶͳύʔαΛߏங

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༗ ໊ ͳ ͷ P a r s e c ( H a s k e l l ) h t t p s : / / g i t h u b . c o m / a s l a t t e r / p a r s e c P a r s i m m o n ( J a v a S c r i p t ) h t t p s : / / g i t h u b . c o m / j n e e n / p a r s i m m o n

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࡞ ͬͯ Έ ͨ ʢ 2 ೥ લ ʣ

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J a v a S c r i p t Ͱ P a r s e c ؙ ύ Ϋ Ϧ h t t p s : / / g i t h u b . c o m / s u s i s u / L o q u a t

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ͱ ͯ ΋ ศ ར ࣗ ࡞ ε Ϋ Ϧ ϓ τ ݴ ޠ G r a s s ί ϯύ Π ϥ ︙

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ੑ ೳ ͸ ʁ

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໿1000ߦͷ JSON × 1000ճ (Node.js v6.7.0) ଎ ౓ ൺ ֱ Parsimmon: 4.8 sec PEG.js: 8.47 sec Loquat: 72724ms ࣗ࡞: ? sec

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໿1000ߦͷ JSON × 1000ճ ଎ ౓ ൺ ֱ Parsimmon: 4.8 sec PEG.js: 8.47 sec ࣗ࡞: 72.7 sec

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No content

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ͳ ͥ ஗ ͍ ʁ

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V 8 ͷ ϓ ϩ ϑ Ν Π ϥ Ͱ ௐ ΂ Δ node --prof parse.js node --prof-process isolate-0x*-v8.log https://github.com/v8/v8/wiki/Using%20V8’s %20internal%20profiler

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஗ ͍ ΋ ͷ ͨ ͪ ύ ʔ α ͷ ݁ ߹ จ ࣈ ͷ ύ ʔε Τ ϥ ʔ ॲ ཧ

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ࠓ ೔ ͷ ϝ Π ϯ Τ ϥ ʔ ॲ ཧ

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Τ ϥ ʔ ॲ ཧ ߏ จ ղ ੳ ࣦ ഊ ࣌ ʹ ώ ϯ τ Λ ग़ ͢ ͨ Ί ϝ ο η ʔ δ ഑ ྻ ͷ ݁ ߹ ͳ Ͳ

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ࣦ ഊ ͠ ͨ ͱ ͖ ͷ Έ ඞ ཁ

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ࣦ ഊ ͢ Δ · Ͱ ܭ ࢉ ͠ ͳ ͍

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஗ Ԇ ධ Ձ

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ܭ ࢉ Λ ஗ Ԇ ͞ ͤ Δ ʹ ͸ ʁ let x = 1 + 2;

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Ϋ ϩ ʔ δ ϟ ʹ ͢ Ε ͹ ྑ ͍ let x = () => 1 + 2;

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ຖ ճ ؔ ਺ ݺ ͼ ग़ ͠ Ω ϟ ο γ ϡ ͞ Ε ͳ ͍ ࢖ ͍ ͮ Β ͍

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Φ ϒ δΣ Ϋ τ Ͱ ϥ ο ϓ

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ΠϯλʔϑΣʔε͕ڞ௨ͨ̎ͭ͠ͷΫϥεΛ࡞੒ ParseError LazyParseError ௨ৗ൛ ஗Ԇ൛

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σʔλΛՃ޻͢Δͱ͖͸஗Ԇ൛Ͱ ܭࢉΛ஗Ԇͤ͞Δ ParseError LazyParseError Ճ޻ʢ݁߹ͳͲʣ Ճ޻

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௨ৗ൛Ͱ͸ getter ͸ͦͷ··஋Λฦ͢ ParseError LazyParseError ஋

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஗Ԇ൛Ͱ͸ getter ͸ධՁ͔ͯ͠Β஋Λฦ͢ ParseError LazyParseError ஋ ධՁ ݁Ռ͸Ωϟογϡ

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݁ Ռ

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໿1000ߦͷ JSON × 1000ճ ଎ ౓ ൺ ֱ ݩ: 72.7 sec վྑ൛: 28.4 sec ஗ԆධՁ͋Γ: ? sec

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໿1000ߦͷ JSON × 1000ճ ଎ ౓ ൺ ֱ ஗ԆධՁ͋Γ: 11.2 sec ݩ: 72.7 sec վྑ൛: 28.4 sec

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໿1000ߦͷ JSON × 1000ճ ଎ ౓ ൺ ֱ Parsimmon: 4.8 sec PEG.js: 8.47 sec վྑ൛ + ஗ԆධՁ: 11.2 sec

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· ͱ Ί

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஗ Ԇ ධ Ձ ͸ ͍ ͍ ͧ ܭ ࢉ ͷ ޮ ཰ Խ ଞ ʹ ΋ ॥ ؀ ఆ ٛ ͳ Ͳ

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ܽ ఺ ΋ ͋ Δ ͷ Ͱ ஫ ҙ ࣌ ؒ ɾ ۭ ؒ త ί ε τ ࢥ Θ ͵ ε λ ο Ϋ ͷ ফ අ

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ύ ʔ α ί ϯ Ϗω ʔ λ v 2 ͝ ظ ଴ Լ ͞ ͍ h t t p s : / / g i t h u b . c o m / s u s i s u / l o q u a t - c o re