今すぐできる、ユーザーとチームのためのiOS速度改善 / Gunosy Kaizen Night iOS development optimization

by Seiji Takahashi

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ࠓ͙͢Ͱ͖Δɺ ϢʔβʔͱνʔϜͷͨΊͷ iOS଎౓վળ @__timakin__ / Gunosy ΧΠθϯ Night #1

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ࣗݾ঺հ • Github: timakin / Twitter: @__timakin__ • Contributor of Go / golang.tokyo / roppongi-golunch • Gunosy ৽نࣄۀ։ൃࣨ ॴଐ • Go / Swift • Recently Contributed / Created • giginet/xcproﬁler • mercari/gaurun • timakin/gopli • timakin/ssm2env • timakin/md2mid • timakin/autocompl

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߹ΘͤͯಡΈ͍ͨ https://speakerdeck.com/timakin/maikurotimudefalsegao-su-naxin-gui-kai-fa-wozhi-erukai-fa-fen-xi-ji-pan

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ࠓ೔࿩͢͜ͱ • iOS(Swift)։ൃͷ଎౓ΧΠθϯ • ϢʔβʔͷͨΊͷ଎౓ΧΠθϯ • νʔϜͷͨΊͷ଎౓ΧΠθϯ

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Goͷ࿩ɺ  ͠·ͤΜʂ

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Swift(iOSΞϓϦ)ྺ 3ϲ݄

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ؒҧͬͯΔ఺͋Δ͔΋Ͱ͕͢ɺ ΑΖ͓͘͠ئ͍͠·͢ʂ

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ͦ΋ͦ΋ͳΜͰ  ଎౓վળ͕ඞཁ͔ʁ

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஗͍ͱԿ͕ى͜Δʁ

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஗͍ͱى͜Δ͜ͱɿΞϓϦମݧฤ • ਓੜແବײ͋ͬͯΞϓϦ࢖Θͳ͘ͳΔ

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஗͍ͱى͜Δ͜ͱɿΞϓϦମݧฤ • ਓੜແବײ͋ͬͯΞϓϦ࢖Θͳ͘ͳΔ • ࡶΞϓϦײ͋ͬͯ։ൃνʔϜͷαϙʔτ͕ෆ҆

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• ਓੜແବײ͋ͬͯΞϓϦ࢖Θͳ͘ͳΔ • ࡶΞϓϦײ͋ͬͯ։ൃνʔϜͷαϙʔτ͕ෆ҆ • ৘ใ͕ܽམͯ͠Πϥͭ͘ ஗͍ͱى͜Δ͜ͱɿΞϓϦମݧฤ

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• ਓੜແବײ͋ͬͯΞϓϦ࢖Θͳ͘ͳΔ • ࡶΞϓϦײ͋ͬͯ։ൃνʔϜͷαϙʔτ͕ෆ҆ • ৘ใ͕ܽམͯ͠Πϥͭ͘ • ଴ͬͯΔؒʹbackground -> ଞͷΞϓϦʹભҠ͠ ͯ໭Δͷ๨ΕΔ ஗͍ͱى͜Δ͜ͱɿΞϓϦମݧฤ

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• ਓੜແବײ͋ͬͯΞϓϦ࢖Θͳ͘ͳΔ • ࡶΞϓϦײ͋ͬͯ։ൃνʔϜͷαϙʔτ͕ෆ҆ • ৘ใ͕ܽམͯ͠Πϥͭ͘ • ଴ͬͯΔؒʹbackground -> ଞͷΞϓϦʹભҠ͠ ͯ໭Δͷ๨ΕΔ • ڝ߹ΞϓϦͱѱ͍఺Λൺ΂ΒΕΔධՁϦεΫ ஗͍ͱى͜Δ͜ͱɿΞϓϦମݧฤ

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• ਓੜແବײ͋ͬͯΞϓϦ࢖Θͳ͘ͳΔ • ࡶΞϓϦײ͋ͬͯ։ൃνʔϜͷαϙʔτ͕ෆ҆ • ৘ใ͕ܽམͯ͠Πϥͭ͘ • ଴ͬͯΔؒʹbackground -> ଞͷΞϓϦʹભҠ͠ ͯ໭Δͷ๨ΕΔ • ڝ߹ΞϓϦͱѱ͍఺Λൺ΂ΒΕΔධՁϦεΫ • αʔϏεͷࢮ ஗͍ͱى͜Δ͜ͱɿΞϓϦମݧฤ

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• ແҙࣝʹ࿘අ͞ΕΔ࣌ؒ ஗͍ͱى͜Δ͜ͱɿ։ൃฤ

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• ແҙࣝʹ࿘අ͞ΕΔ࣌ؒ • ΢Οϯυ΢Ҡͬͯɺ΍͕ͯूத్͕੾ΕΔ ஗͍ͱى͜Δ͜ͱɿ։ൃฤ

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• ແҙࣝʹ࿘අ͞ΕΔ࣌ؒ • ΢Οϯυ΢Ҡͬͯɺ΍͕ͯूத్͕੾ΕΔ • ໭͖ͬͯͯ࡞ۀΛࢥ͍ग़͢ͷʹίϯςΩετεΠο νͷίετ͕͔͔Δ ஗͍ͱى͜Δ͜ͱɿ։ൃฤ

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• ແҙࣝʹ࿘අ͞ΕΔ࣌ؒ • ΢Οϯυ΢Ҡͬͯɺ΍͕ͯूத్͕੾ΕΔ • ໭͖ͬͯͯ࡞ۀΛࢥ͍ग़͢ͷʹίϯςΩετεΠο νͷίετ͕͔͔Δ • ݕূʹऔΕΔ͕࣌ؒݮΔ ஗͍ͱى͜Δ͜ͱɿ։ൃฤ

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• ແҙࣝʹ࿘අ͞ΕΔ࣌ؒ • ΢Οϯυ΢Ҡͬͯɺ΍͕ͯूத్͕੾ΕΔ • ໭͖ͬͯͯ࡞ۀΛࢥ͍ग़͢ͷʹίϯςΩετεΠο νͷίετ͕͔͔Δ • ݕূʹऔΕΔ͕࣌ؒݮΔ • ϦϦʔε͕஗ΕΔ ஗͍ͱى͜Δ͜ͱɿ։ൃฤ

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• ແҙࣝʹ࿘අ͞ΕΔ࣌ؒ • ΢Οϯυ΢Ҡͬͯɺ΍͕ͯूத్͕੾ΕΔ • ໭͖ͬͯͯ࡞ۀΛࢥ͍ग़͢ͷʹίϯςΩετεΠο νͷίετ͕͔͔Δ • ݕূʹऔΕΔ͕࣌ؒݮΔ • ϦϦʔε͕஗ΕΔ • Πέͯͳ͍։ൃνʔϜʹͳͬͯਓ΋ݺ΂ͳ͍ ஗͍ͱى͜Δ͜ͱɿ։ൃฤ

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• ແҙࣝʹ࿘අ͞ΕΔ࣌ؒ • ΢Οϯυ΢Ҡͬͯɺ΍͕ͯूத్͕੾ΕΔ • ໭͖ͬͯͯ࡞ۀΛࢥ͍ग़͢ͷʹίϯςΩετεΠο νͷίετ͕͔͔Δ • ݕূʹऔΕΔ͕࣌ؒݮΔ • ϦϦʔε͕஗ΕΔ • Πέͯͳ͍։ൃνʔϜʹͳͬͯਓ΋ݺ΂ͳ͍ • αʔϏεͷࢮ ஗͍ͱى͜Δ͜ͱɿ։ൃฤ

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• ͱʹ͔͘ࢮ͵ ஗͍ͱى͜Δ͜ͱɿ·ͱΊ

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୭ͷͨΊʹ଎͘͢Δ͔

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1. Ϣʔβʔ

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2. νʔϜ

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ϢʔβʔͷͨΊͷ଎౓վળ • ىಈվળͷ࿩͠·͢

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https://developer.apple.com/videos/play/ wwdc2016/406/

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https://developer.apple.com/videos/play/ wwdc2017/413/

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ϢʔβʔͷͨΊͷ଎౓վળ • ىಈ͕஗͘ͳΔݪҼ • ىಈΛܭଌ͢Δํ๏ • վળํ๏

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ىಈ͕஗͘ͳΔݪҼ • Too many dylibs

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ىಈ͕஗͘ͳΔݪҼ • Too many dylibs • Too many class/method declarations

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• Too many dylibs • Too many class/method declarations • Too many initializers ىಈ͕஗͘ͳΔݪҼ

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• Too many dylibs • Too many class/method declarations • Too many initializers • SDK ىಈ͕஗͘ͳΔݪҼ

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• Too many dylibs • Too many class/method declarations • Too many initializers • SDK • API Call ىಈ͕஗͘ͳΔݪҼ

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• Too many dylibs • Too many class/method declarations • Too many initializers • SDK • API Call • Middleware ىಈ͕஗͘ͳΔݪҼ

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• ࣌ؒͷ͔͔Δॲཧ͸daemonͰ Dyld3

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• ࣌ؒͷ͔͔Δॲཧ͸daemonͰ • ෳࡶͳॲཧ(Mach-O parse/compile)  ͸શ෦ͦͬͪʹدͤΔ Dyld3

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• ࣌ؒͷ͔͔Δॲཧ͸daemonͰ • ෳࡶͳॲཧ(Mach-O parse/compile)  ͸શ෦ͦͬͪʹدͤΔ • launch closure caching Dyld3

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ىಈܭଌ • Instruments • Time Proﬁler

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ىಈܭଌ • Instruments • Time Proﬁler • Static Initializer Calls  (iOS11 / Mac OS High Sierra)

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ىಈܭଌ • Instruments • Time Proﬁler • Static Initializer Calls  (iOS11 / Mac OS High Sierra) • DYLD_PRINT_STATISTICS

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DYLD_PRINT_STATISTICS Total pre-main time: 2.5 seconds (100.0%) dylib loading time: 1.3 seconds (54.0%) rebase/binding time: 111.49 milliseconds (4.3%) ObjC setup time: 432.17 milliseconds (16.9%) initializer time: 631.54 milliseconds (24.7%) slowest intializers : libSystem.B.dylib : 22.83 milliseconds (0.8%) xxx-ios : 500.72 milliseconds (19.5%)

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վળํ๏ • Fewer dylibs • ࢖༻ස౓ͷ௿͍UIϥΠϒϥϦͳͲΛͻͨ͢ Βআڈ

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վળํ๏ • Fewer initializers • initͰඞཁͳ͍ॲཧ͸ۃྗআ֎

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վળํ๏ • Fewer initializers • initͰඞཁͳ͍ॲཧ͸ۃྗআ֎ • Debug༻ͷϥΠϒϥϦͷinitͳͲΛຊ൪Ͱআ֎

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վળํ๏ • Fewer initializers • initͰඞཁͳ͍ॲཧ͸ۃྗআ֎ • Debug༻ͷϥΠϒϥϦͷinitͳͲΛຊ൪Ͱআ֎ • RxSwiftͰແҙࣝʹ΍ͬͯͨॏෳAPI Callͷআڈ

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վળํ๏ • Fewer initializers • initͰඞཁͳ͍ॲཧ͸ۃྗআ֎ • Debug༻ͷϥΠϒϥϦͷinitͳͲΛຊ൪Ͱআ֎ • RxSwiftͰແҙࣝʹ΍ͬͯͨॏෳAPI Callͷআڈ • SDKͷฒྻsetup

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վળํ๏ • Fewer classes/methods • structͰએݴͰ͖Δ΋ͷ͸ۃྗஔ͖׵͑

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վળํ๏ • Fewer classes/methods • structͰએݴͰ͖Δ΋ͷ͸ۃྗஔ͖׵͑ • ࢖ͬͯͳ͍Ϋϥεɺ࢖༻ස౓ͷ௿͍Ϋϥεͷআ ڈ

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Ҏ্ɺϢʔβʔͷͨΊʹ  ىಈΛ଎͘͢Δ࿩ɻ

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νʔϜͷͨΊͷ଎౓վળ • Ϗϧυ࣌ؒͷ࿩Λ͠·͢ɻ

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νʔϜͷͨΊͷ଎౓վળ • Ϗϧυ͕஗͘ͳΔݪҼ • Ϗϧυ࣌ؒΛܭଌ͢Δํ๏ • վળํ๏

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Ϗϧυ͕஗͘ͳΔݪҼ • ཁ͢ΔʹίϯύΠϥ΍ϥΠϒϥϦͷϚούʔ ʹ࢓ࣄͤ͗͢͞

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Ϗϧυ࣌ؒΛܭଌ͢Δํ๏ • -Xfrontend -debug-time-function-bodies

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Ϗϧυ࣌ؒΛܭଌ͢Δํ๏ • -Xfrontend -debug-time-function-bodies • ؔ਺͝ͱͷϏϧυ࣌ؒܭଌ(Swift)

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Ϗϧυ࣌ؒΛܭଌ͢Δํ๏ • giginet/xcproﬁler

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Ϗϧυ࣌ؒΛܭଌ͢Δํ๏ • giginet/xcproﬁler

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Ϗϧυ࣌ؒΛܭଌ͢Δํ๏ • giginet/xcproﬁler • Ruby੡gemύοέʔδ

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Ϗϧυ࣌ؒΛܭଌ͢Δํ๏ • giginet/xcproﬁler • Ruby੡gemύοέʔδ • ϝιου୯ҐͰܭଌ࣌ؒ(ms)Λιʔτͯ͠ ςʔϒϧग़ྗ

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Ϗϧυ࣌ؒΛܭଌ͢Δํ๏ • giginet/xcproﬁler • Ruby੡gemύοέʔδ • ϝιου୯ҐͰܭଌ࣌ؒ(ms)Λιʔτͯ͠ ςʔϒϧग़ྗ • giginet/danger-xcproﬁlerͱซ༻ͯ͠΋͍͍ ͔΋

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վળํ๏ • ͱΓ͋͑ͣ50~60msͷϥΠϯΛ௒͑ͨΒɺ  ؾ͍ͮͨλΠϛϯάͰؔ਺ຖϏϧυ࣌ؒΛ  ݮΒ͢

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վળํ๏ • ܕਪ࿦ආ͚Δ  ʢClosure໭Γ஋, Variableએݴ౳ʣ

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վળํ๏ • ܕਪ࿦ආ͚Δ  ʢClosure໭Γ஋, Variableએݴ౳ʣ • ϝιουνΣΠϯආ͚ΔʢҰ࣌ม਺ʹ֨ೲʣ

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վળํ๏ • ܕਪ࿦ආ͚Δ  ʢClosure໭Γ஋, Variableએݴ౳ʣ • ϝιουνΣΠϯආ͚ΔʢҰ࣌ม਺ʹ֨ೲʣ • ഑ྻ݁߹(don’t +, append)

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վળํ๏ • ܕਪ࿦ආ͚Δ  ʢClosure໭Γ஋, Variableએݴ౳ʣ • ϝιουνΣΠϯආ͚ΔʢҰ࣌ม਺ʹ֨ೲʣ • ഑ྻ݁߹(don’t +, append) • `??` ΍ࡾ߲ԋࢉࢠ࢖Θͳ͍

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վળํ๏ • ܕਪ࿦ආ͚Δ  ʢClosure໭Γ஋, Variableએݴ౳ʣ • ϝιουνΣΠϯආ͚ΔʢҰ࣌ม਺ʹ֨ೲʣ • ഑ྻ݁߹(don’t +, append) • `??` ΍ࡾ߲ԋࢉࢠ࢖Θͳ͍ • lazy propertiesͷϓϥΠϕʔτϝιουԽ

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վળํ๏ • ܕਪ࿦ආ͚Δ  ʢClosure໭Γ஋, Variableએݴ౳ʣ • ϝιουνΣΠϯආ͚ΔʢҰ࣌ม਺ʹ֨ೲʣ • ഑ྻ݁߹(don’t +, append) • `??` ΍ࡾ߲ԋࢉࢠ࢖Θͳ͍ • lazy propertiesͷϓϥΠϕʔτϝιουԽ • ObjectMapperۃྗ࢖Θͳ͍

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վળํ๏ • ܕਪ࿦ආ͚Δ  ʢClosure໭Γ஋, Variableએݴ౳ʣ • ϝιουνΣΠϯආ͚ΔʢҰ࣌ม਺ʹ֨ೲʣ • ഑ྻ݁߹(don’t +, append) • `??` ΍ࡾ߲ԋࢉࢠ࢖Θͳ͍ • lazy propertiesͷϓϥΠϕʔτϝιουԽ • ObjectMapperۃྗ࢖Θͳ͍ • CocoaPodsΛv1.3.0Ҏ্ʹΞοϓάϨʔυ͢Δ

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CocoaPods >= v1.3.0

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CocoaPods >= v1.3.0 • Dynamic FrameworkͷpathΩϟογϡͷόά͕  मਖ਼͞ΕͨͬΆ͍ʁ

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CocoaPods >= v1.3.0 • Dynamic FrameworkͷpathΩϟογϡͷόά͕  मਖ਼͞ΕͨͬΆ͍ʁ • ΍͹͍͘Β͍଎͘ͳΔɻ  LUCRA͸ॳظϏϧυ͡Όͳ͚Ε͹2ඵ͘Β͍ʹͳͬͨɻ

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Ҏ্ɺνʔϜͷͨΊʹ  ϏϧυΛ଎͘͢Δ࿩ɻ

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• αʔϏεͷࢮʹͭͳ͕ΔͷͰ଎౓վળ͔ͬ͠Γɻ • ϢʔβʔͷͨΊͷվળ • XCodeඋ͑෇͚ͷػೳͰىಈ࣌ؒܭଌɻ • ίϯύΠϥɾϦϯΧʹ༏͍͠ίʔυɾߏ੒Λɻ • νʔϜͷͨΊͷվળ • पลπʔϧ࢖͍ͭͭϏϧυ࣌ؒܭଌɻ • γϯλοΫεɺpodsͳͲ஍ಓʹվળɻ ·ͱΊ

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Thank you!