Node8.3.0ʹ͍ͭͯ Yuta Hiroto(@about_hiroppy) ඈͼࠐΈLT(5min)  

Me Twitter: about_hiroppy
 GitHub: abouthiroppy ኍށ ༟େ  

ݱࡏͷNodeͷঢ়گ • current(master) - v9.0.0-pre • latest - v8.2.1 • Current Proposal - v8.3.0 • LTS(Long Term Support) • Boron - v4.8.4 (status: Maintenance) • Argon - v6.11.2 (status: Active) • Carbon - v8.x (status: Pending(2017/10 ~))  

v8.3.0 proposalͷେ͖ͳมߋ • V8ͷv6.0΁ΞοϓάϨʔυ • ͜ΕʹΑΓɺύϑΥʔϚϯεϓϩϑΝΠϧ
 ͕େ෯ʹมߋ͞ΕΔ • WHATWG Encoding Standard 
 (TextDecoderͱTextEncoder)͕࣮૷͞Εͨ https://github.com/nodejs/node/pull/14594  

v8.3.0 proposalͷେ͖ͳมߋ • V8ͷv6.0΁ΞοϓάϨʔυ • ͜ΕʹΑΓɺύϑΥʔϚϯεϓϩϑΝΠϧ
 ͕େ෯ʹมߋ͞ΕΔ • WHATWG Encoding Standard 
 (TextDecoderͱTextEncoder)͕࣮૷͞Εͨ https://github.com/nodejs/node/pull/14594  

TurboFan + Ignition
 ͕σϑΥϧτͱͳΔʂ  

NodeͱV8 • V8ͷv5.9͔ΒσϑΥϧτͱͳΔ
 TurboFanͱIgnitionͱ͍͏ͷ͕͋Γ·͢ • NodeͰॳΊͯσϑΥϧτʹͳΔͷ͕
 ࠓճͷมߋͱͳΓ·͢ • v5.9͸NodeͷϦϦʔεϥΠϯʹೖ͓ͬͯΒͣɺ
 v6.0͔ΒೖΔ͔ΒͰ͢  

TurboFan + Ignition • TurboFan • JIT CompilerͰCrankshaft͔Βஔ͖׵ΘΔ΋ͷͰ͢ • ES2015Ͱͷ࠷దԽࠔ೉ͳ෦෼΍try-catchͷ࠷దԽͳͲ͕ՄೳͱͳΓ·͢ • chrome 41͔Βஈ֊తʹ࢖༻͞Εͯ·ͨ͠ • Ignition • Register machine • ϞόΠϧ୺຤ͷϝϞϦফඅ࡟ݮΛ໨ඪͱͯ͠࡞ΒΕͨΠϯλϓϦλ • JSͷίʔυΛbytecodeʹ͠·͢  

V8ͷ࣮ߦϑϩʔ  https://docs.google.com/presentation/d/1OqjVqRhtwlKeKfvMdX6HaCIu9wpZsrzqpIVIwQSuiXQ/edit#slide=id.g1357e6d1a4_0_58 

ϕϯνϚʔΫ  

Node Core • Internal Modules(V8 v5.9) • buffers
 events
 http ()
 querystring
 streams
 string_decoder
 url
 util  v5.9Ͱ͸ओʹࠨͷϞδϡʔϧͷ
 ϕϯνϚʔΫ͕v5.8
 ΑΓԼ͕ͬͯ͠·ͬͨ 
 ͔͠͠ɺv6.0/6.1ͰTurboFan
 ͷଟ͘ͷ໰୊఺͕վળ͞ΕͨͷͰ
 ࠓޙ͸΋ͬͱྑ͘ͳΔ 

node benchmark.js 390.80s cpu 8:16.27 total webpack  v8.2.1
 (V8 v5.8) v8.3.0
 (V8 v6.0) node benchmark.js 385.03s cpu 7:47.66 total 

Loading: Load Performance median: 147.627503ms Single File: CPU Speed is 3100 with multiplier 13000000 Performance budget exceeded: 5423.646407ms (limit: 4193.548387096775ms) Multi Files (0 files): CPU Speed is 3100 with multiplier 39000000 Performance budget exceeded: 13073.789987ms (limit: 12580.645161290322ms) ESLint  Loading: Load Performance median: 141.143209ms Single File: CPU Speed is 3100 with multiplier 13000000 Performance budget exceeded: 5300.968599ms (limit: 4193.548387096775ms) Multi Files (0 files): CPU Speed is 3100 with multiplier 39000000 Performance budget exceeded:13120.178363ms (limit: 12580.645161290322ms) v8.2.1
 (V8 v5.8) v8.3.0
 (V8 v6.0) 

ϕϯνϚʔΫʹؔͯ͠ • جຊతʹվળ͞Ε͍ͯΔ(v8.2.1͔Βv8.3.0) • NodeͷInternal modulesͰ͸
 100%Ҏ্ͷվળ΋͋Ε͹ɺѱԽ΋͋Δ  

·ͱΊ • 8݄தʹ8.3.0͕ϦϦʔε͞Ε·͢ • NodeͷV8͕v6.0΁ΞοϓάϨʔυ͞ΕΔ
 5.8 → 6.0 • WHATWG Encoding Standard͕ೖΔ • ࠓޙɺNode, Chrome͸ߋʹ଎͘ͳΔ  

͜ͷLTͷهࣄ  Node8.3.0ͰσϑΥϧτʹͳΔTF/IʹؔΘΔ
 ϕϯνϚʔΫʹ͍ͭͯ http://abouthiroppy.hatenablog.jp/entry/2017/08/03/095304 

౦ژNodeֶԂࡇ2017  CFPͷక੾͕8݄ͷ15೔ͳͷͰ ൃද͍ͨ͠ํ͸ͥͻԠื͍ͯͩ͘͠͞ʂʂʂ 

Thanks!