Build Time Analyzer - Speaker Deck

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Ϗϧυ࣌ؒͷվળ 2018/02/23

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͸͡Ίʹ • 2೥ఔલʹSwiftͷϏϧυ࣌ؒͷ஗͕͞࿩୊ʹ • ରࡦํ๏΋͍͔ͭ͘঺հ͞Ε͍ͯͨΓ΋ͨ͠ • ࣗ෼΋஗͍ͱײ͡Δ͜ͱ͸͋Γࢼͯ͠Έ͍ͨ ͱࢥ͍͕ͬͯͨɺ࣮ࡍʹࢼͨ͜͠ͱ͸ͳ͔ͬ ͨ

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͸͡Ίʹ • ๭ϓϩδΣΫτͷίʔυΛݟͨ࣌ʹ͜Ε͸Ϡ όͦ͏ͱࢥͬͨ • ࣮ࡍɺ൒୺ͳ͘஗͔ͬͨ • ͕࣌ؒͰ͖ͨͷͰࢼͯ͠Έͨ

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Ϗϧυ࣌ؒͷܭଌ

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શମͷϏϧυ࣌ؒ • defaultsίϚϯυͰXcode্ʹϏϧυ࣌ؒΛද ࣔͰ͖ΔΑ͏ʹઃఆ͢Δ

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શମͷϏϧυ࣌ؒ • DerivedData࡟আ • ΫϦʔϯʢ㵰+⇧+Kʣ • Ϗϧυʢ㵰+Bʣ

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શମͷϏϧυ࣌ؒ • DerivedData࡟আ • ΫϦʔϯʢ㵰+⇧+Kʣ • Ϗϧυʢ㵰+Bʣ

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ܭଌ༻ͷϏϧυઃఆΦϓγϣϯ -Xfrontend Swift compiler ﬂags

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[Build Settings] -> [OTHER_SWIFT_FLAGS] ʹઃఆ

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-debug-time-function-bodies • -Xfrontend -debug-time-function-bodies • ϝιουผͷίϯύΠϧ࣌ؒΛଌఆ

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-warn-long-function-bodies • -Xfrontend -warn-long-function-bodies=100 • ίϯύΠϧʹ100msҎ্͔͔͍ͬͯΔίʔυΛܯࠂ • Swift3.0Ҏ߱Ͱ༗ޮʁ • কདྷతʹ࡟আ͞ΕΔՄೳੑ • https://github.com/apple/swift/commit/ 18c75928639acf0ccf0e1fb6729eea75bc09cbd5

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-warn-long-expression-type- checking • -Xfrontend -warn-long-expression-type- checking=50 • ܕਪ࿦ʹ50msҎ্͔͔͍ͬͯΔίʔυΛܯࠂ • Xcode9 GM͔Β

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๭ϓϩδΣΫτ • Swift2.2 & Xcode7.1.1 • -warn-long-function-bodies -warn-long-expression-type-checking ͕࢖͑ͳ͍

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Ҏ߱ Swift2.2+Xcode7.1.1 ͰͷௐࠪͰ͢

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ϝιουຖͷܭଌ

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ܭଌπʔϧ • xcodebuild http://irace.me/swift-proﬁling • Build Time Analyzer for Xcode https://github.com/RobertGummesson/BuildTimeAnalyzer-for-Xcode • xcproﬁler

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ܭଌπʔϧ • xcodebuild http://irace.me/swift-proﬁling • Build Time Analyzer for Xcode https://github.com/RobertGummesson/BuildTimeAnalyzer-for-Xcode • xcproﬁler

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• gem install xcprofiler • Build Settings -> Other Swift Flagsʹ -Xfrontend -debug-time-function-bodies Λઃఆ • Ϗϧυ • xcprofiler [PRODUCT_NAME or ACTIVITY_LOG_PATH] [options] xcprofiler

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xcproﬁler

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ίʔυϕʔεͰͷվળ

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ίʔυϕʔεͰͷվળ 1.ܕਪ࿦ ʢλΠϓώϯςΟϯάɺClosureɺGenericsʢϝιουνΣΠϯʣʣ 2.݁߹ʢ഑ྻɺจࣈྻʣ 3.Closures and lazy properties 4.Ternary Conditional Operatorʢࡾ߲ԋࢉࢠʣ 5.Nil-Coalescing Operatorʢ??ʣ

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ܕਪ࿦ λΠϓώϯςΟϯά

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഑ྻͷλΠϓώϯςΟϯάΛ ෇͚Δ

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Ϗϧυ࣌ؒ NT CFGPSF BGUFS ʢ‑ʣ

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ܕਪ࿦ Closure

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$MPTVSFʹܕΛ໌ࣔ

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Ϗϧυ࣌ؒ NT CFGPSF BGUFS ʢ‑ʣ

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ܕਪ࿦ GenericsʢϝιουνΣΠϯʣ

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ϥΠϒϥϦ3VOFTʹΑΔ ΦϖϨʔλʔͷར༻Λ΍ΊΔ ϝιουνΣΠϯΛ΍ΊΔ

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Ϗϧυ࣌ؒ NT CFGPSF BGUFS ʢ‑ʣ

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഑ྻͷ݁߹

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Before

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ԋࢉࢠΛBQQFOEϝιουʹมߋ

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Ϗϧυ࣌ؒ NT CFGPSF BGUFS ʢ‑ʣ

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จࣈྻͷ݁߹

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Before

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ԋࢉࢠΛ΍Ίͯ ΠϯϥΠϯల։ʹมߋ

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Ϗϧυ࣌ؒ NT CFGPSF BGUFS ʢ‑ʣ

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ԋࢉࢠΛKPJOϝιουʹมߋ

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Ϗϧυ࣌ؒ NT CFGPSF BGUFS ʢ‑ʣ

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ίʔυϕʔεҎ֎Ͱͷվળ https://github.com/fastred/Optimizing-Swift- Build-Times

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·ͱΊ

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• ͪΐͬͱͨ͠มߋͰ͔ͳΓͷ͕࣌ؒ୹ॖ • ਺ඵʗ໿630ඵͷ୹ॖͳͷͰɺຊ౰ʹվળ͞Εͨͷ͔࣮ ײ͕ͳ͍ʢମײతʹ͸Ϗϧυ࣌ؒ͸໿15෼͙Β͍ʣ • Not Swifty • Swiftݴޠ࢓༷Λ׆͔ͨ͠هड़͕Ͱ͖ͳ͍ • ίʔυྔͷ૿Ճ • ίʔυͷՄಡੑ͕͕͋Δ৔߹΋ • ܕΛ໌ࣔ͢Δ͜ͱͰ೺Ѳ͠΍͘͢ͳΔ

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• Swift2.2+Xcode7.1.1ͷ؀ڥͰͷௐࠪͳͷͰɺ ࠓͷ࠷৽ͷSwift4+Xcode9ͷ؀ڥͰ͸վળ͞ Ε͍ͯΔ΋ͷ΋͋Δ͸ͣ

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Swiftyͳίʔυ΋ॻ͖ͭͭɺ ۠੾Γͷ͍͍ͱ͜ΖͰܭଌ͠ ͯΈͯɺۃ୺ʹϏϧυʹ࣌ؒ ͕͔͔͍ͬͯΔ৔߹͸ίʔυ Λݟ௚ͯ͠ΈΔ

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Appendix • https://developers.cyberagent.co.jp/blog/archives/7815/ • https://medium.com/@fkei/xcodeͷϏϧυ࣌ؒΛ୹ॖ͢Δ ํ๏·ͱΊ-2017-10-20࣌఺-bea6dc4f9fc0 • https://qiita.com/ruwatana/items/21b25781a2f44ccf29e2 • https://qiita.com/you_matz/items/ e95f30023eccc8d96357 • https://qiita.com/rizumita/items/913b05d799b3712260f6