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The Cacher in the Rye
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Tsukasa OISHI
December 07, 2018
Programming
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5.6k
The Cacher in the Rye
Tsukasa OISHI
December 07, 2018
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Transcript
Tsukasa Oishi tsukasaoishi 5IF$BDIFSJOUIF3ZF
͓͓͍͔ͭ͠͞
None
None
None
None
GSBHNFOUDBDIF
ߋ৽සͷ͍ίϯςϯπ
-40 -20 0 20 40 4݄ 5݄ 6݄ 7݄ 8
-40 -20 0 20 40 4݄ 5݄ 6݄ 7݄ 8
Eviction
256B 307B
256B 307B
256B 307B
256B 307B
256B 307B
256B 307B
256B 307B
256B 307B
256B 307B
256B 307B
256B 307B
256B 307B
NFNDBDIFE࠶ىಈ
3BJMTσϑΥϧτͰΩϟογϡۭ͕ؒͻͱͭ
ڧ͍͕ͭಠΓΊ
CJU[FS@TUPSFHFN STU@PCKFDUT VTFS@GPPUFS TIBSFE STU@GPPUFS FYUFSOBM
CJU[FS@TUPSFHFN Rails.cache.fetch(key, sheep: :rst_footer) STU@PCKFDUT VTFS@GPPUFS EFGBVMU STU@GPPUFS FYUFSOBM
PCKFDUDBDIF
3FTUBVSBOUpOE@CZ@DBDIF JE
3BJMTDBDIFGFUDI ʜ EP 3FTUBVSBOUQSFMPBE SFTUBVSBOU@TDPSF QSFGFDUVSF DBUFHPSZ@BT
pOE JE FOE
৯ϩάͷ͋ͪΒͪ͜ΒͰ ΘΕΔΑ͏ʹͳͬͨ
Benchmark.driver do |x| x.report "AR", %|Restaurant.preload( :restaurant_score, :prefecture, :category_as ).find(1)|
x.report "cache", %|Rails.cache.read(“1")| x.report "mono", %|Restaurant.find(1)| x.compare! end
mono: 1887.1 i/s cache: 729.3 i/s - 2.59x slower AR:
57.5 i/s - 32.84x slower
3FTUBVSBOUΦϒδΣΫτ͕ཉ͍͚ͩ͠ͳΒ ;ͭ͏ʹ3FTUBVSBOUpOEͨ͠΄͏͕ ͔ͬͨʜ
Ωϟογϡʹ ίετ͕͔͔Δ
طଘͷίʔυͯ͠·ͤΜ
mono: 1887.1 i/s cache: 729.3 i/s - 2.59x slower AR:
57.5 i/s - 32.84x slower 2.59ഒ ͍! େมͩ!
NTͷͩ͠ɺͦ͜ϘτϧωοΫͰͳ͍
DBDIFDMFBS
3FTUBVSBOU DSFBUFVQEBUFEFMFUF 3FTUBVSBOU PCKFDUDBDIF 3FTUBVSBOU GSBHNFOUDBDIF
SFTUBVSBOUTςʔϒ ϧʹ ΧϥϜՃͰྫ֎ൃੜ
3FTUBVSBOU DSFBUFVQEBUFEFMFUF 3FTUBVSBOU PCKFDUDBDIF 3FTUBVSBOU GSBHNFOUDBDIF 3FTUBVSBOU BMUFSUBCMF
ϚΠΫϩαʔϏε
3FTUBVSBOU DSFBUFVQEBUFEFMFUF 3FTUBVSBOU PCKFDUDBDIF 3FTUBVSBOU GSBHNFOUDBDIF 3FTUBVSBOU BMUFSUBCMF 3FTUBVSBOU DSFBUFVQEBUFEFMFUF
3FTUBVSBOU GSBHNFOUDBDIF
Ͳ͏ӡ༻͢Δʹͯ͠ίετ૿େ͢Δ
ԯਓͷਓͨͪΛ͚ͩͤ͢͜͠ʹ͢Δ XFBSFIJSJOH
Ωϟογϡ͍ΕΕ ͪΐͬͺͰ͢Α
ӡ༻Λߟ্͑ͨͰ Λݴ͓ͬͯΔͷ͔
తͱظ͢ΔޮՌ ϨεϙϯελΠϜΛ͍ͨ͘͠ αʔόϦιʔεΛิ͍͍ͨ
ӡ༻ͱίετ ΩϟογϡσʔλͷҰੜ ͯ͢ͷΩϟογϡ͕ফ͑ͨͱ͖ ΩϟογϡΛҙ࣮ࣝͨ͠ ࢹͱอक
ϦεΫ ΩϟογϡΛΊΒΕͳ͍ దͰͳ͍Ωϟογϡ͕ΘΕͨ Ωϟογϡ͕ফ͑ͳ͍ ώοτ͗ͯ͢ίετ͚͕͔͔ͩΔ
ΩϟογϡΛ͍͍ͨͱࢥͬͨͱ͖ͷߟ͑ํ
Θͳ͍
ϨεϙϯελΠϜΛ͍ͨ͘͠ αʔόϦιʔεΛิ͍͍ͨ
ͪΌΜͱߟ͑ͯઃܭͱ࣮Λ͢Ε తΛୡͰ͖Δ
Ͱɺ ͜ΕΛΖ͏ͱͨ͠Β Ͳ͏ͬͨͬͯ Ωϟογϡൈ͖͡ΌແཧͩΖ
اըͷஈ֊Ͱʮ͜Εةͳ͘ͶʁʯΛײ͡औΔ
ຊʹΓ͍ͨ͜ͱΛཧղͯ͠ ઐՈͱͯ͠ ͖ͪΜͱͨ͠ସҊΛग़͢
Ωϟογϡʹର͢Δߟ͑ํ
ෛ࠴
ෛ࠴ѱ Ͱͳ͍
͍͟ͱ͍͏ͱ͖ ֮ޛΛͬͯ ෛ࠴Λഎෛ͏
৯ϩάͰͷΩϟογϡ ेͳϦιʔε͕͋ΔͷͰجຊతʹΩϟογϡෆཁ ಥൃతͳΞΫηε૿ʹରԠ͢ΔͨΊʹ ࣌ؒ55-ͷΞΫγϣϯΩϟογϡΛ ͍ͬͯΔ͜ͱ͋Δ աڈʹ࡞ͬͯͣͬͱӡ༻͞Ε͚͍ͭͮͯΔ มͳΩϟογϡ͕͍͔ͭ͋͘ΔͷͰ ͳ͍͖͍ͯͨ͘͠
͓͠·͍