How to find problem causes and performance improvement

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How to ﬁnd problem causes and improve performance DroidKaigi 2017.3.10 Room1 11:50- Fukui Atsuko

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About me • ෱Ҫರࢠ / Fukui Atsuko • @muumuumuumuu • Retty, Inc. • ͦͷલ͸૊ΈࠐΈܥAndroidͷ͓࢓ࣄ

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Agenda • ໨ඪɺલఏ஌ࣝͷ֬ೝ • Case 1: Systrace • Case 2: Allocation Tracker • ͓·͚1: Memory Leak • ͓·͚2: ֶशࢿྉ

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ຊ೔ͷ໨ඪ

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΋ͬ͞ΓΞϓϦΛͲ͏ʹ͔͢Δͱ͖ʹ ḷΓ͕ͪͳ੒௕Ϩϕϧ • ͦ΋ͦ΋Ͳ͏͍͍͔ͯ͠Θ͔Βͳ͍ (´ʀωʀʆ) • ίʔυ͔ΒΞλϦΛ͚ͭͯ੩తղੳ ( ◠‿◠ ) • πʔϧΛ׆༻ͯ͠ޮ཰Α͘վળ ٩( 'ω' )و

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΋ͬ͞ΓΞϓϦΛͲ͏ʹ͔͢Δͱ͖ ʹॳ৺ऀͷḷΓ͕ͪͳ੒௕Ϩϕϧ • ͦ΋ͦ΋Ͳ͏͍͍͔ͯ͠Θ͔Βͳ͍ (´ʀωʀʆ) • ίʔυ͔ΒΞλϦΛ͚ͭͯ੩తղੳ ( ◠‿◠ ) • πʔϧΛ׆༻ͯ͠ޮ཰Α͘վળ ٩( 'ω' )و ͜ͷ͋ͨΓͷਓΛର৅ʹ͓࿩͠͠·͢

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΋ͬ͞ΓΞϓϦΛͲ͏ʹ͔͢Δͱ͖ ʹॳ৺ऀͷḷΓ͕ͪͳ੒௕Ϩϕϧ • ͦ΋ͦ΋Ͳ͏͍͍͔ͯ͠Θ͔Βͳ͍ (´ʀωʀʆ) • ίʔυ͔ΒΞλϦΛ͚ͭͯ੩తղੳ ( ◠‿◠ ) • πʔϧΛ׆༻ͯ͠ޮ཰Α͘վળ ٩( 'ω' )و ͜ͷϨϕϧ·Ͱ͍͘ͷ͕໨ඪ

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Android Performance લఏ஌ࣝ

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Androidʹ͓͚ΔPerformance • ҰͭͷApplicationʹMain Thread͸Ұͭ • ฒྻॲཧΛ͔ͨͬͨ͠ΒผThreadʹॲཧΛ෼ ͚Δඞཁ͕͋Δ

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Androidʹ͓͚ΔPerformance • Application͝ͱʹAndroidγεςϜͷϦιʔε ʢCPU, ϝϞϦʣͷୣ͍߹͍ • γεςϜ͕֤ApplicationʹϝϞϦΛׂΓ౰ͯΔ • ϝϞϦ্ݶʹୡ͢ΔͱGC͕૸Δ • CPU͕࢖ΘΕͯPerformance͕௿Լ

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ANR • Application Not Responding (ΞϓϦέʔ γϣϯ͕Ԡ౴͍ͯ͠·ͤΜ) • Input Event͕5ඵҎ্Ԡ౴ͳ͠ • Broadcast Receiverͷॲཧʹ10ඵҎ্͔͔ Δ

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۩ମతʹ

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͝঺հ͢Δπʔϧ • ͳΔ΂͘ීஈ։ൃऀ͕਌͠ΜͰ͍ΔπʔϧΛ ࢖͏ • Android Studio (v2.2.3)

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ίʔυΛ࢖ͬͯઆ໌͠·͢ • Android NͷEaster Egg • ίʔυ͕ެ։͞Ε͍ͯ·͢ • https://android.googlesource.com/ platform/frameworks/base/+/ android-7.0.0_r1/packages/EasterEgg • ʮpackages/eastereggʯͰάάͬͯ΋ग़·͢

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Neko • ͻͨ͢ΒͶ͜ΛूΊΔΞϓϦ • Ͷ͋ͭ͜ΊͷΑ͏ʹڈͬͨΓ͠ͳ͍ • Quick Settingsʹ㕒Λஔ͍͓ͯ͘ͱͶ͕͜૿ ͍͑ͯ͘

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͜Μͳײ͡

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ɹ ͕100ඖۙ͘ू·Δͱ… • Ұཡը໘Λ։͖ͳ͕Β㕒Λஔ͘ͱANR • Ұཡը໘ΛεΫϩʔϧ͢Δͱ΋ͨͭ͘

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Case 1:  Ұཡը໘Λ։͖ͳ͕Β 㕒Λஔ͘ͱANR

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ANRྫ

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ύϑΥʔϚϯεͰࠔͬͨ࣌͸ • Ͳͷॲཧʹ͕͔͔͍࣌ؒͬͯΔ͔ௐ΂Δ • ͕͔͔͍࣌ؒͬͯΔॲཧΛվળ͢Δ

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ύϑΥʔϚϯεͰࠔͬͨ࣌͸ • Ͳͷॲཧʹ͕͔͔͍࣌ؒͬͯΔ͔ௐ΂Δ • ͕͔͔͍࣌ؒͬͯΔॲཧΛվળ͢Δ

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Systrace • ApplicationͱγεςϜશମͷTrace LogΛऔ ಘͰ͖Δ • ࣌ؒ࣠ͰThread͝ͱʹԿ͕ى͍ͬͯ͜Δ͔Θ ͔Δ • ANRͷݪҼͱͳΔMain ThreadΛϒϩοΫ ͍ͯ͠ΔݪҼ͕ݟ͑Δ

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Systrace • Device MonitorΛ্ཱͪ͛Δ • Tools > Android > Android Device Monitor

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Systrace (ଓ͖) • DeviceλϒͰtraceର৅ͷΞϓϦΛબ୒ • ɹɹΛΫϦοΫ • ͍ΖΜͳઃఆΛ֬ೝͯ͠OKΛΫϦοΫ

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݁ՌΛݟͯΈΔ • html͕ੜ੒͞ΕΔ

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ͳΜ͔ಡΈࠐ·ΕͯΔ…

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Ͳͷลͷίʔυ͕ಈ͍͍ͯΔ͔ʁ • “R.drawable.body” ͰίʔυΛݕࡧ • Ͳ͏΍Β ɹ ɹΛඳը͢Δॲཧ͕ಈ͍͍ͯΔ

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ύϑΥʔϚϯεͰࠔͬͨ࣌͸ • Ͳͷॲཧʹ͕͔͔͍࣌ؒͬͯΔ͔ௐ΂Δ • ͕͔͔͍࣌ؒͬͯΔॲཧΛվળ͢Δ

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ॲཧΛվળ͠Α͏ • վળҎલʹͦ΋ͦ΋ඞཁͳॲཧͳͷ͔ߟ͑Δ • 㕒Λ͓͘λΠϛϯάͰ ɹ ͷඳըॲཧ͸ ඞཁͳ͍͸ͣ • ෆඞཁͳॲཧ͕ಈ͍ͯίετ্͕͕͍ͬͯ Δ

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ίʔυͷ௥͍ํ • ɹɹ Λඳը͢ΔτϦΨʔΛϦετΞοϓ • Ұཡը໘ͷonCreate() • Shared Preference ͷมߋ௨஌

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ίʔυͷ௥͍ํ • Shared Preferenceͷมߋ௨஌ͷτϦΨʔΛ ߟ͑ͯΈΔ • ɹ ɹͷσʔλͱ㕒ͷ৘ใΛҰͭͷShared Preferenceʹ·ͱΊͯ͠·ͬͨ • 㕒ͷঢ়ଶ͕มΘͬͨͨΊɹɹɹΛ࠶ඳը

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मਖ਼ํ๏ • ΋ͱ΋ͱҰͭͷSharedPreference Τα Ұཡը໘࠶ඳըॲཧ 4IBSFE1SFGFSFODF$IBOHF-JTUFOFS

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• σʔλΛ෼཭͠ɺద੾ͳൣғͰlistenerΛઃ ఆ Τα मਖ਼ํ๏ Ұཡը໘࠶ඳըॲཧ 4IBSFE1SFGFSFODF$IBOHF-JTUFOFS

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Case 2: Ұཡը໘ΛεΫϩʔϧ͢Δͱ ΋ͨͭ͘

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΋͖ͨͭྫ

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ύϑΥʔϚϯεͰࠔͬͨ࣌͸ • Ͳͷॲཧʹ͕͔͔͍࣌ؒͬͯΔ͔ௐ΂Δ • ͕͔͔͍࣌ؒͬͯΔॲཧΛվળ͢Δ

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Allocation Tracker (DDMS) • Applicationͷmemory allocationΛه࿥ • ه࿥ର৅ • Call Stack • ϝϞϦαΠζ

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Allocation Tracker (DDMS) • Android Studioىಈ • Android Monitor > Monitors >

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Allocation Tracker (ଓ͖) • Tracking͕ελʔτ͢ΔͷͰɺը໘Λૢ࡞͠ ͯ΋͔ͨͭͤΔ • Tracking͍ͨ͠ಈ࡞͕ऴྃͨ͠Β΋͏Ұ౓ɹ Λԡͯ͠Trackingऴྃ

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݁ՌΛݟͯΈΔ • .allocϑΝΠϧ͕ੜ੒͞ΕΔ

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݁ՌΛݟͯΈΔ • Stack Trace ΛͨͲΕɺͲ͕͜ॏ͍͔Θ͔Δ • ӈΫϦοΫͰιʔείʔυʹඈ΂·͢ʂ

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΋͖ͨͭͷݪҼ • εΫϩʔϧ͢Δͱ͖ʹɹɹ ͷΞΠίϯΛඳ ը͢Δॲཧ͕ॏ͗͢Δ • ॲཧͷৄࡉΛಡΜͰΈΔ • Bitmapͷੜ੒ɺVector Drawableͷੜ੒Λ શͯϝΠϯεϨουͰ࣮ߦ

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ύϑΥʔϚϯεͰࠔͬͨ࣌͸ • Ͳͷॲཧʹ͕͔͔͍࣌ؒͬͯΔ͔ௐ΂Δ • ͕͔͔͍࣌ؒͬͯΔॲཧΛվળ͢Δ

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ॲཧͷվળ • ॏ͍ͨॲཧΛผεϨουʹҠͯ͠ɺը໘ͷߋ ৽ॲཧͷΈϝΠϯεϨουͰߦ͏Α͏ʹมߋ ͢Δ • ը໘ͷߋ৽ॲཧ͸UIεϨουͰߦ͏ඞཁ͕ ͋ΔͷͰ஫ҙ

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͓·͚ Memory Leakʹ͍ͭͯ

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Memory Leak • GC (Garbage Collection)ର৅ʹͳΒͳ͍͚ ΕͲɺ࢖ΘΕ͍ͯͳ͍ΦϒδΣΫτ͕ϝϞϦ ώʔϓʹډ࠲Γଓ͚Δ͜ͱ • ղ์͞Εͳ͍ͱ࢖༻ՄೳͳϝϞϦ͕ݮ͍ͬͯ ͘ͷͰɺGC͕සൟʹى͜ΓɺύϑΥʔϚϯ ε͕௿Լ͢Δ

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Heap Viewer (DDMS) • ಛఆ࣌఺ͷϝϞϦͷঢ়گΛݟΔ͜ͱ͕Ͱ͖Δ

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Heap Viewer (DDMS) • Device MonitorΛ্ཱͪ͛Δ • Tools > Android > Android Device Monitor

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Heap Viewer (DDMS) • Device Tab > ର৅ͷϓϩηεΛબ୒ • ɹΛԡͯ͠ Cause GCϘλϯԡԼ

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Heap Viewer (DDMS) • ೚ҙͷλΠϛϯάͰGCΛىͯ͜͠Heap Size ΍γεςϜʹׂΓ౰ͯΒΕͨϝϞϦΛ֬ೝͰ ͖Δ

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Leak Canary • Square͕ࣾΦʔϓϯιʔεͰެ։͍ͯ͠Δ library • https://github.com/square/leakcanary • LeakΛݕ஌ͨ͠ΒϦΞϧλΠϜͰ௨஌ • ͲͷΠϯελϯε͕Leak͔ͨ͠Θ͔Δ

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͓·͚ ֶशࢿྉ

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Android Developers • ͝ଘ஌ެࣜReference • ͜ͷ͋ͨΓ͕ΦεεϝͰ͢ • Develop > Training > Best Practices for Performance • Develop > Android Studio >User Guide > Proﬁle Your App

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UDACITY • ΦϯϥΠϯֶशϓϥοτϑΥʔϜ • https://www.udacity.com/ • Google͕ύʔτφʔγοϓΛక݁ • Android Performanceίʔε • ಈըͱίʔυͱΫΠζͷ૊Έ߹Θͤ

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ॻ੶ • ϝϞϦϦʔΫͷ࿩͕΅Μ΍Γͱ͔͠Θ͔Βͳ ͔ͬͨਓ޲͚ • JavaͰͳͥͭ͘Δͷ͔ ஌͓͖͍ͬͯͨJava ϓϩάϥϛϯάͷجૅ஌ࣝ • ถ࣋ ޾ण, ೔ܦBPࣾ, 309p

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ॻ੶ • AndroidͷThread΍ProcessΛ΋ͬͱ஌Γͨ ͍ਓ޲͚ • Androidͷͳ͔Έ InsideAndroid • Tae Yeon Kimଞ, ύʔιφϧϝσΟΞ, 506p

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Thank you!