Xcode が遅い! とにかく遅い!! 遅い Xcode をなんとかする方法

by Yoshimasa Niwa

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ͱʹ͔͘஗͍!! ஗͍ Xcode ΛͳΜͱ͔͢Δํ๏ @niw 9/12/2022 — Tokyo, Japan iOSDC Japan 2022 Xcode ͕஗͍!

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Yoshimasa Niwa @niw

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Xcode ஗͍Ͱ͢ΑͶ

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Xcode ͕஗͍ ීஈͷΫϦʔϯϏϧυ͸10෼͘Β͍ͰऴΘΔ ϫʔΫεʔϖʔεΛ։͍ͯϏϧυͨ͠Β Xcode ͕ࢭ·Δ ৔߹ʹΑͬͯ͸ Xcode ͕൓Ԡ͠ͳ͘ͳͬͯ͠·͏ ͳ͔ͥ೔ʹΑͬͯ͸ͱͯ΋Ϗϧυʹ͕͔͔࣌ؒΔ

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ϫʔΫεʔϖʔεΛ։͍ͯ Ϗϧυ͢Δͱࢭ·Δ໰୊

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ϫʔΫεʔϖʔεΛ։͍ͯ  Ϗϧυ͢Δͱࢭ·Δ໰୊ Ϗϧυ͢Δͱ Planning Ͱͱ·ͬͯɺProvisioning ͱදࣔ͞ Εͯਐ·ͳ͍ ͜ͷঢ়ଶͩͱϏϧυΛࢭΊΔ͜ͱ΋Ͱ͖ͳ͍

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ϫʔΫεʔϖʔεΛ։͍ͯ  Ϗϧυ͢Δͱࢭ·Δ໰୊ Xcode ڧ੍ऴྃ͢Δ͔͠ͳ͍ Activity Monitor ΛݟΔͱ XCBBuildService ͕ 900% ͘Β͍ CPUΛ࢖ͬͯΔ

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͜Ε͸ Xcode ͷ໰୊

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Xcode ͷ໰୊ ϫʔΫεϖʔεΛ։͘ͱɺݟ͑Δશ෦ͷϓϩδΣΫτͷΠϯ σοΫεΛ࡞Ζ͏ͱ͢Δ ΠϯσοΫε࡞੒ͷ࡞ۀΛ XCBBuildService ʹґཔ͢Δ ͜ͷ࡞ۀͷͳ͔Ͱ͋ΔόάΛ;Ή ͦͷ݁Ռ XCBBuildService ͕൓Ԡ͠ͳ͘ͳΔ

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XCBBuildService ͱ͸ Xcode ͷϏϧυΛ͔ͭ͞ͲΔผͷϓϩάϥϜ Xcode ͱ͸ϓϩηεؒ௨৴Λ͍ͯ͠Δ

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Xcode ͷ໰୊ XCBBuildService ͕όάΛ౿Ήͱ൓Ԡ͠ͳ͘ͳΔ Xcode ͕ϏϧυϦΫΤετΛૹͬͯ΋൓Ԡ͠ͳ͍ͷͰࢭΊΔ ͜ͱ΋Ͱ͖ͳ͍

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ճආࡦ

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Xcode ͷ໰୊͋ΔڍಈΛ્ࢭ͢Δ ΠϯσοΫεͷػೳͦͷ΋ͷΛࢭΊΔඞཁ͸ͳ͍ ϫʔΫεϖʔεΛ։͍ͨޙʹى͜Δ໰୊ͷ͋Δશ෦ͷΠϯ σοΫεΛ࡞ΔڍಈΛ્ࢭ͢Ε͹ྑ͍

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Xcode ͷ໰୊͋ΔڍಈΛ્ࢭ͢Δ Xcode ͱ XCBBuildService ͱͷؒʹԿ͔͍Εͯɺશ෦ͷΠ ϯσοΫεΛ࡞ΔϦΫΤετΛ્ࢭ͢Ε͹Α͍ͷͰ͸? ϦΫΤετΛ્ࢭ

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XCBBUILDSERVICE_PATH ࣮͸ XCBBuildService ͸ XCBBUILDSERVICE_PATH ؀ڥม ਺ͰมߋͰ͖Δ XCBBuildService Λஔ͖׵͑ͯ Xcode ͱΦϦδφϧͷ XCBBuildService ͷؒʹೖͬͯϓϩηεؒ௨৴Λ๦֐͢Ε͹ ͍͍

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github.com/MobileNativeFoundation/XCBBuildServiceProxyKit XCBBuildServiceProxyKit SwiftNIO ϕʔεͷ࣮૷ HybridXCBBuildService Λ࢖͑͹࣮ݱͰ͖Δ

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XCBBuildServiceProxyKit Λ࢖͏

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XCBBuildServiceProxyKit Λ࢖͏ ࣗલͷ XCBBuildService Λ࡞ΓɺHybridXCBBuildService ࢖ͬͯϦΫΤετΛୣ͏ ෳ਺ͷλʔήοτͷΠϯσοΫεΛ࡞Δ CreateBuildRequest ͕͖ͨΒ્ࢭ ͦΕҎ֎͸ΦϦδφϧͷ XCBBuildService ʹԣྲྀ͠

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func handleRequest( _ request: RPCRequest, ... ) { switch request.payload { case let .createBuildRequest(message): let buildRequest = message.buildRequest if buildRequest.parameters.action == "indexbuild", buildRequest.configuredTargets.count > 1 { context.sendErrorResponse("Abort", request: request) return } default: break } context.forwardRequest() }

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XCBBuildServiceProxyKit Xcode Λىಈ͢Δͱ͖ʹ open --env XCBBUILDSERVICE_PATH=ࣗ෼ͷ XCBBuildService /Applications/Xcode.app ͱ͢Δ

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͜ͷճආࡦͷ໰୊఺ Xcode ͕ࢭ·ͬͯ͠·͏໰୊͸ճආͰ͖Δ ςετεΩʔϚͳͲෳ਺λʔήοτͷϏϧυΛ͢Δͱࢭ·Δ ͷ͸௚ͤͳ͍ɻಉ͡ঢ়ଶʹͳͬͯ͠·͏ɻ Create build description ͕ͱͯ΋஗͍ͳͲɺ࣮ࡍͷϏϧυ͕ ஗͍໰୊͸ճආͰ͖ͳ͍

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࣮͸…

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Xcode 14 ͦ΋ͦ΋ͷ XCBBuildService ͷόά͕ Xcode 14 Beta 2 Ͱͳ ͓Γ·ͨ͠ Xcode 14 ͷ Release Candidate ΋ϦϦʔε͞Ε·ͨ͠

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͜ͷճආࡦ͸طʹෆཁ

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ͨ·ʹීஈΑΓ  Ϗϧυ͕஗͘ͳΔ໰୊

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ͨ·ʹීஈΑΓϏϧυ͕஗͘ͳΔ໰୊ Ϗϧυ͕ਐΜͰ͍ͳ͍Α͏ʹݟ͑Δ Activity Monitor ΛΈΔͱҰͭͷ swift-frontend ΍ clang ͚͕ͩ ಈ࡞͍ͯ͠Δ CPU͕Ջͯ͠Δ

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ϩοΫػߏͷ໰୊

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ͨ·ʹීஈΑΓϏϧυ͕஗͘ͳΔ໰୊ clang ಺෦ʹ͋Δ llvm ͷϩοΫػߏ͕ݪҼ clang ͕Ұ͔ͭ͠ಈ͚ͳ͍ঢ়گ͕͋Δ Swift ΋಺෦Ͱ clang ࢖ͬͯΔ

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clang.llvm.org/docs/Modules.html clang ͷϞδϡʔϧͱϩοΫ ௨ৗ clang ͸ϞδϡʔϧΛ୳࣌͢ʹɺσΟεΫʹ͋ΔϞ δϡʔϧΩϟογϡΛ࢖͏ ϞδϡʔϧΩϟογϡ͸ίϯύΠϧ࣌ͷϑϥάͳͲͷઃఆ͝ ͱʹผʑͷ΋ͷ͕࡞ΒΕΔ ݟ͔ͭΒͳ͔ͬͨΒͦͷ࣌ʹ࡞ΒΕΔ

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clang.llvm.org/docs/Modules.html clang ͷϞδϡʔϧͱϩοΫ ͜͜Ͱෳ਺ͷ clang ͕ಉ࣌ʹಉ͡ϞδϡʔϧΛඞཁͱͨ͠৔ ߹ɺಉ͡ϞδϡʔϧΛ࡞ΔͷΛ๷͙ͨΊʹϩοΫΛऔΔ ϞδϡʔϧϑΝΠϧͷύεΛ llvm::LockFileManager Λ࢖ͬ ͯϩοΫ͢Δ

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llvm::LockFileManager ϑΝΠϧͷύε͝ͱʹྡʹ .lock ϑΝΠϧΛ࡞ͬͯɺϓϩη ε͝ͱʹϩοΫΛऔΕΔ࢓૊Έ ϩοΫ͕औΕͳ͔ͬͨΒղ์͞ΕΔ·Ͱ଴ͭػೳ͕͋Δ

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͜ͷϩοΫػߏʹ໰୊͕͋Δ

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llvm::LockFileManager::waitForUnlock() Ethernet ͷিಥݕग़ʹࣅͨ࢓૊Έ ·ͣ 10 ms * ͋Δൣғͷཚ਺ (࠷େ500 ms) Λ଴ͭ ·ͩղ์͞Εͳ͔ͬͨΒൣғΛ2ഒʹͯ͠·ͨ଴ͭɻ͜ΕΛ ܁Γฦ͢ɻσϑΥϧτͰ࠷େ1෼30ඵ଴ͭɻ

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clang ͕ϩοΫͷղ์Λ଴ͯͳ͔ͬͨ৔߹ clang ͸ϩοΫ͕औΕͣɺղ์͕଴ͯͳ͔ͬͨ৔߹ɺطଘͷ ϩοΫΛ࡟আͯ͠΋͏Ұ౓ϩοΫΛऔΖ͏ͱ͢Δ ෳ਺ͷ clang ͕ಉ͡ϞδϡʔϧΛ୳͍ͯͨ͠৔߹ɺ͜͜Ͱ ϩοΫͷऔΓ߹͍ʹͳΔ

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clang ͕ϩοΫͷղ์Λ଴ͯͳ͔ͬͨ৔߹ ͋Δ clang ͕ͱͬͨϩοΫ͕ղ์੍ݶ࣌ؒ·Ͱʹղ์͞Εͳ ͍ͱɺ͜ΕΛ܁Γฦ͢ ͜ͷ݁Ռɺӡྑ͘ϩοΫ͕औΕͨҰͭͷ clang ͔͠࢓ࣄ͕ Ͱ͖ͳ͍͕࣌ؒͰ͖Δ

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Module clang clang clang

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Module clang clang clang

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Module clang clang clang .lock !

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Module clang clang clang .lock ! "

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Module clang clang clang .lock ! " ⏳

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Module clang clang clang .lock ! "

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Module clang clang clang .lock ! "

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Module clang clang clang "

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Module clang clang

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Module clang clang

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Module clang clang .lock !

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Module clang clang .lock ! "

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Module clang clang .lock ! " ⏳

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Module clang clang .lock ! "

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Module clang clang .lock ! "

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Module clang clang "

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Module clang

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Module clang

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Module clang .lock !

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Module clang .lock ! "

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Module clang "

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Module

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ճආࡦ

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ϩοΫ͠ͳ͍Α͏ʹ͢Δ ࠷ۙಋೖ͞ΕͨΦϓγϣϯ BuildingImplicitModuleUsesLock Ͱ ͜ͷϩοΫΛ࢖Θͳ͍Α͏ʹ͢Δ͜ͱ͕Ͱ͖Δ OTHER_CFLAGS ʹ -Xclang -fno-implicit-modules-use-lock Λ଍͢

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͜ͷճආࡦͷ໰୊఺ ෳ਺ͷ clang ͕ಉ͡ϞδϡʔϧΛ࡞ΔՄೳੑ͕૿͑ΔͷͰ τʔλϧͰޮՌ͸͋Δ͔͸ঢ়گ࣍ୈ ͨͩɺϏϧυ͕ࢭ·Βͳ͘ͳΔͷͰؾ෼͸ྑ͍

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ࠜຊతͳղܾ llvm::LockFileManager ΍ clang ͷڍಈΛม͑Δඞཁ͕͋Δ Xcode Ͱ͸ swift ΍ clang ͸πʔϧνΣʔϯͱͯ͠ఏڙ͞Εͯ ͍Δ

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πʔϧνΣʔϯΛஔ͖׵͑Δ Xcode ͕࢖͏πʔϧνΣʔϯ͸ஔ͖׵͕͑Մೳ ͜ΕΒͷڍಈΛม͑ͨ clang ΛؚΉπʔϧνΣʔϯΛ࡞Δ ~/Library/Developer/Toolchains ʹ഑ஔ͢Δͱ Xcodeͷϝχϡʔ͔Β੾Γସ͑ΒΕΔ

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πʔϧνΣʔϯΛஔ͖׵͑Δ ͨͩ͠ɺπʔϧνΣʔϯͷϏϧυ͸͔ͳΓେม clang ͚ͩͳΒɺCC ؀ڥม਺Ͱஔ͖׵͑Δͱ͍͏͜ͱ΋Ͱ͖ Δ

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࣮͸…

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ࠜຊతͳղܾ llvm::LockFileManager ͷ࣮૷ʹ͸ // FIXME: implement event-based waiting ͬͯॻ͍ͯ͋Δɻ

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ͳ͓ͯ͠…

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Xcode ΍ΊΔ?

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Xcode ͷ໰୊఺ Xcode ΍ΊΔ? Xcode ͸جຊతʹ Apple ͔͠खग़͠Ͱ͖ͳ͍͏͑ʹߋ৽͕஗ ͍ Xcode ͸جຊతʹϓϩμΫτͱͯ͠ɺେ͖ͳΞϓϦΛϏϧυ ͢Δސ٬͕λʔήοτͰ͸ͳ͍Α͏ʹࢥ͑Δ

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Xcode ͷར఺ Xcode ΍ΊΔ? ϓϥοτϑΥʔϜͷ৽͍͠ػೳʹଈ࠲ʹ௥ैͰ͖Δɻ macCatalyst ͳͲɻ Xcode ͸σϑΝΫτɻ΄ͱΜͲͷ։ൃऀ͕࢖͍ͬͯΔɻ

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֎෦ͷϏϧυπʔϧ

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ݱঢ়ɺۀքඪ४ͩͱࢥΘΕΔϏϧυπʔϧ Ұ؏ੑΛॏࢹͨ͠πʔϧͰɺͦͷ݁ՌΩϟογϡΛଟ༻Ͱ ͖ɺશମͷϏϧυ͕࣌ؒݮΔ ଟ͘ͷେ͖Ίͷ iOS ΞϓϦͰطʹଟ͘࢖ΘΕ͍ͯΔ Bazel

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Xcode ͷϏϧυΛஔ͖׵͑Δ External Build System λʔήοτΛ࢖͏ Run Script Phase Λ࢖͏ XCBBuildService Λஔ͖׵͑Δ

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Ϗϧυͷ৘ใ΁ͷΞΫηε XCBBuildService Ͱ͸Ϗϧυͷ৘ใ͸ Project Interchange Format (PIF) ͰऔಘͰ͖Δ Swift Package Manager ʹ࣮૷ͷ֓ཁ͕͋Δ

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Xcode ͷϏϧυΛஔ͖׵͑Δ Ҡߦظʹ͸ XCBBuildService Λஔ͖׵͑ΔͳͲͷख๏Ͱ Xcode ͱ֎෦ͷϏϧυπʔϧΛཱ྆ͤ͞Δ ࠷ऴతʹ͸֎෦ͷϏϧυπʔϧ͚ͩʹ͢Δ Xcode ͷϓϩδΣΫτ΋֎෦ϏϧυπʔϧͰੜ੒͢ΔΑ͏ʹ ͢Δ

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·ͱΊ Xcode ͷϏϧυ͸ XCBBuildService ͱ͍͏ผͷϓϩηε͕ ୲͍ͬͯΔ XCBBuildService ͸ஔ͖׵͕͑Մೳɻ஗͘ͳΔόάΛճආ͠ ͨΓɺ֎෦ϏϧυπʔϧΛ࢖͏ͷʹΤϯτϦϙΠϯτͱͯ͠ ࢖͑Δ

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·ͱΊ Xcode ͕஗͍ͷ͸ clang ͳͲͷπʔϧνΣʔϯͷ໰୊Ͱ͋Δ ͜ͱ΋͋Δ ͜ΕΒ͸πʔϧνΣʔϯΛஔ͖׵͑Δ͜ͱͰ໰୊ΛճආͰ͖ Δ