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遅延評価と健康
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Susisu
October 16, 2016
Programming
0
620
遅延評価と健康
遅延評価でパーサコンビネータを高速化した話
http://connpass.com/event/39553/
Susisu
October 16, 2016
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Transcript
Ԇ ධ Ձ ͱ ݈ ߁ 2 0 1
6 - 1 0 - 1 6 O U C C LT ձ # 5 @susisu2413
Ԇ ධ Ձ Ͱ ύ ʔ α ί ϯ
Ϗω ʔ λ Λ ޮ Խ ͠ ͨ Λ ͠ · ͢
ύ ʔ α ί ϯ Ϗω ʔ λ ʁ
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
ೖ ྗ Τ ϥ ʔ Γ ύʔα ύʔαΛؔͰදݱ
ʢ࣮༻্ΦϒδΣΫτͰϥοϓʣ
ೖ ྗ Τ ϥ ʔ Γ ύʔα ύ
ʔ α ύ ʔ α ύʔα ίϯϏωʔλ ύʔαίϯϏωʔλͰΑΓෳࡶͳύʔαΛߏங
༗ ໊ 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
࡞ ͬͯ Έ ͨ ʢ 2 લ ʣ
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
ͱ ͯ ศ ར ࣗ ࡞ ε Ϋ Ϧ
ϓ τ ݴ ޠ G r a s s ί ϯύ Π ϥ ︙
ੑ ೳ ʁ
1000ߦͷ JSON × 1000ճ (Node.js v6.7.0) ൺ ֱ
Parsimmon: 4.8 sec PEG.js: 8.47 sec Loquat: 72724ms ࣗ࡞: ? sec
1000ߦͷ JSON × 1000ճ ൺ ֱ Parsimmon: 4.8
sec PEG.js: 8.47 sec ࣗ࡞: 72.7 sec
None
ͳ ͥ ͍ ʁ
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
͍ ͷ ͨ ͪ ύ ʔ α ͷ
݁ ߹ จ ࣈ ͷ ύ ʔε Τ ϥ ʔ ॲ ཧ
ࠓ ͷ ϝ Π ϯ Τ ϥ ʔ ॲ
ཧ
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
ࣦ ഊ ͠ ͨ ͱ ͖ ͷ Έ ඞ ཁ
ࣦ ഊ ͢ Δ · Ͱ ܭ ࢉ ͠ ͳ
͍
Ԇ ධ Ձ
ܭ ࢉ Λ Ԇ ͞ ͤ Δ ʹ
ʁ let x = 1 + 2;
Ϋ ϩ ʔ δ ϟ ʹ ͢ Ε ྑ
͍ let x = () => 1 + 2;
ຖ ճ ؔ ݺ ͼ ग़ ͠ Ω ϟ
ο γ ϡ ͞ Ε ͳ ͍ ͍ ͮ Β ͍
Φ ϒ δΣ Ϋ τ Ͱ ϥ ο ϓ
ΠϯλʔϑΣʔε͕ڞ௨ͨ̎ͭ͠ͷΫϥεΛ࡞ ParseError LazyParseError ௨ৗ൛ Ԇ൛
σʔλΛՃ͢Δͱ͖Ԇ൛Ͱ ܭࢉΛԆͤ͞Δ ParseError LazyParseError Ճʢ݁߹ͳͲʣ Ճ
௨ৗ൛Ͱ getter ͦͷ··Λฦ͢ ParseError LazyParseError
Ԇ൛Ͱ getter ධՁ͔ͯ͠ΒΛฦ͢ ParseError LazyParseError ධՁ ݁ՌΩϟογϡ
݁ Ռ
1000ߦͷ JSON × 1000ճ ൺ ֱ ݩ: 72.7
sec վྑ൛: 28.4 sec ԆධՁ͋Γ: ? sec
1000ߦͷ JSON × 1000ճ ൺ ֱ ԆධՁ͋Γ: 11.2
sec ݩ: 72.7 sec վྑ൛: 28.4 sec
1000ߦͷ JSON × 1000ճ ൺ ֱ Parsimmon: 4.8
sec PEG.js: 8.47 sec վྑ൛ + ԆධՁ: 11.2 sec
· ͱ Ί
Ԇ ධ Ձ ͍ ͍ ͧ ܭ ࢉ
ͷ ޮ Խ ଞ ʹ ॥ ఆ ٛ ͳ Ͳ
ܽ ͋ Δ ͷ Ͱ ҙ ࣌
ؒ ɾ ۭ ؒ త ί ε τ ࢥ Θ ͵ ε λ ο Ϋ ͷ ফ අ
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