Androidにおけるパフォーマンスチューニング実践

by neonankiti

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"OESPJEʹ͓͚Δ ύϑΥʔϚϯενϡʔχϯά࣮ફ @neonankiti

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גࣜձࣾFiNC Technologies — Mobile Engineer(Android/iOS/Flutter) ೆཬ༐ؾ @neonankiti #εϊϘʔ #όεέ #Ωϟϯϓ #௼Γ #GoldGym ࣗݾ঺հ

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ύϑΥʔϚϯε՝୊ͷࢦఠ CTO ΞϓϦͷಈ࡞͓΋ͳ͍ʁ͸΍ͯ͘͠΍ɻ Θ͔Γ·ͨ͠ʂʂ σʔλফඅྔ΍͹͘ͳ͍ʁ௚ͯ͠΍ɻ ΊͬͪΌి஑৯ͬͯͳ͍ʂʁʂʁʂ

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ͳΜ͔Θ͔ΒΜ͚Ͳɺ΍ͬͯΈΔ͔

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νʔϜͷ࠶ฤ੒ Before After ػೳ1 ػೳ2 ػೳ3 ػೳ1 ػೳ2 ػೳ3 ڞ ௨ ج ൫

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ڞ௨ج൫νʔϜര஀

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ͳͥνʔϜΛ࠶ฤ੒ͨ͠ͷ͔ʁ νʔϜମ੍͸ػೳ(υϝΠϯ)୯Ґ →ػೳ୯ҐͰ͸੹೚͕ᐆດͳ໰୊͕ੜ͡Δ

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۩ମతʹى͖ͨ໰୊ ɾݪҼͷΘ͔Γਏ͍Ϋϥογϡ ɾσʔλ௨৴ྔͷ૿Ճ ɾόοςϦʔফඅͷ૿Ճ ɾͳΜ͔΋ͬ͞Γͯ͠Δ

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ڞ௨ج൫νʔϜͷൃ଍΁ ಛఆͷػೳʹґଘ͠ͳ͍໰୊Λվળ͠ ΞϓϦͷ඼࣭ΛߴΊΔ͜ͱ͕੹຿

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RailsςοΩʔͳ࿩ ϚΠΫϩαʔϏεͷཁૉٕज़ͷ࿩ Ϛωδϝϯτͷ࿩ ΞϓϦύϑΥʔϚϯεվળͷલʹ

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ΞϓϦύϑΥʔϚϯεͱ͸ʁ

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ϢʔβʔମݧʹӨڹΛ༩͑Δཁૉ ɾΫϥογϡ ɾANR ɾσʔλϩʔυ ɾUI(Ξχϝʔγϣϯ) ɾόοςϦʔফඅ ɾσʔλ௨৴ྔ ΞϓϦύϑΥʔϚϯε

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ϦϦʔεޙʹൃੜ͠΍͍͢ ݦࡏԽͷλΠϛϯά ϦϦʔε ςετ ʷ ύϑΥʔϚϯεѱԽ

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ͳͥϦϦʔεޙʹൃੜ͠΍͍͢ͷ͔ʁ ςετͰͷ࠶ݱੑ͕೉͍͠ ɾຊ൪։ൃ2"؀ڥͷࠩҟ ɾ࣌ؒత੍໿Ͱػೳςετ͕ࠔ೉

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ςετΑΓલͷϑϩʔͰରࡦ͢Δ ࣮૷࣌ʹՄೳͳݶΓࢭΊΔ ϦϦʔε ςετ ʷ ύϑΥʔϚϯεѱԽ ࣮૷

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ΤϯδχΞ͕ग़དྷΔ͜ͱ ɾલఏͱͳΔ஌ࣝΛ͚ͭΔ ɾΞϯνύλʔϯΛ౿·ͳ͍࣮૷ ΞϓϦύϑΥʔϚϯεʹؔͯ͠

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ຊ೔ͷτϐοΫ

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ຊ೔࿩߲͢໨ ɾ6*ͷվળ ɾσʔλ௨৴ྔ ɾόοςϦʔফඅ ࠶ݱੑ͕೉͍߲͠໨

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RailsςοΩʔͳ࿩ ϚΠΫϩαʔϏεͷཁૉٕज़ͷ࿩ Ϛωδϝϯτͷ࿩ ΞϓϦύϑΥʔϚϯενϡʔχϯά࣮ફ

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ύϑΥʔϚϯενϡʔχϯά࣮ફ 6*ͷվળ σʔλ௨৴ྔ όοςϦʔফඅ

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ɾ6*ͷΧΫπΩ UIͷ໰୊ ɾ$16 (16ʹෛ୲Λ༩͑Δॲཧ

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ɾ6*ͷΧΫπΩ UIͷ໰୊ ɾ$16 (16ʹෛ୲Λ༩͑Δॲཧ

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ͳͥ6*͸ΧΫπΫͷ͔ʁ

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'SBNF3BUF͕௿͍

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ɾFPS = Frame Per Secondsɻ ɾਓؒ͸ɺ60FPS͕࠷దͱײ͡Δ Frame Rateͱ͸ ɾ60FPS ≒ 16ms/frame ≒1ඵؒʹॲཧ͞ΕΔϑϨʔϜ਺(੩ࢭը໘)

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'14ͷ࣮ݱ

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ΞϓϦͷىಈ = Linuxϓϩηεͷىಈ શͯͷλεΫ͸ϝΠϯεϨου(UIεϨου)Ͱ࣮ߦ UI Drawing LameWork App Events UI Drawing UI Drawing Main Thread(UI Thread) PROCESS AndroidΞϓϦͷ࣮ߦϓϩηε ࢀߟ IUUQTXXXZPVUVCFDPNXBUDI W)92IVRG576MJTU1-R@V8#8R:U7*S';8S#;D#@XG98

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NTGSBNFΛӽ͑ͯ͠·͏ →Frame͕Drop͞ΕΔ 16ms UI Drawing LameWork App Events UI Drawing UI Drawing Main Thread(UI Thread) PROCESS 16ms 16ms Drop Over 16ms 60FPSͷࣦഊ

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ɾλεΫΛNTGSBNFʹ཈͑Δ 60FPSͷ࣮ݱํ๏ ɾλεΫΛ෼ࢄ͢Δ

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ɾωοτϫʔΫॲཧ 16ms/frameΛΦʔόʔ͠΍͍͢λεΫ ɾ*0ॲཧ ˠϝΠϯεϨουͱผεϨουͰ࣮ߦ

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1. εϨου(ҎޙϫʔΧʔεϨου)ͷੜ੒ 2. ϫʔΧʔεϨου্ͰλεΫ࣮ߦ 3. ݁ՌΛϝΠϯεϨου΁ Worker Thread Main Thread(UI Thread) Update some UI Prep some work Do some long work ϚϧνεϨοσΟϯά

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ɾϝϞϦ؅ཧϦʔΫ ϚϧνεϨοσΟϯάͷҰൠతͳίετ ɾεϨουੜ੒ͷΦʔόʔϔου

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εϨουΛ͍ͭੜ੒͠ɺഁغ͢Δ͔͸ඞܾͣΊΔ ɾView͔Βͷࢀর(Activity) -> LeakCanaryͷར༻ ϝϞϦ؅ཧ/ϦʔΫରԠ ɾMemory Profilerͷར༻

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Memory Profiler 1. ώʔϓɺϝϞϦྔͷλΠϜϥΠϯ 2. ಛఆͷλΠϛϯάͰͷΞϩέʔτ͞ΕͨΦϒδΣΫτ 1 2 ࢀߟ IUUQTEFWFMPQFSBOESPJEDPNTUVEJPQSPpMFNFNPSZQSPpMFS IMKB

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ɾCPU Profileͷར༻ εϨουੜ੒ͷΦʔόʔϔουରԠ ɾεϨουੜ੒͸Φʔόʔϔουίετ͕ߴ͍ ɾεϨουࣗମΛݮΒ͢(࠷େݸ਺͸CPUʹґଘ) ɾ࠶ར༻(RxJava͸ThreadPoolΛར༻) ࢀߟ IUUQTEFWFMPQFSBOESPJEDPNTUVEJPQSPpMFDQVQSPpMFS IMKB

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ɾ6*ͷΧΫπΩ UIͷ໰୊ ɾ$16 (16ʹෛ୲Λ༩͑Δॲཧ

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ϨϯμϦϯά

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ɾը໘ͷσʔλ͸πϦʔߏ଄ AndroidϨϯμϦϯάͷಛ௃ ɾιϑτ΢ΣΞඳըͱϋʔυ΢ΣΞΞΫηϥϨʔγϣϯ Ҏޙ)8"

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ɾτϥόʔαϧͳϓϩηεͷͨΊίετ͕ߴ͍ ϨϯμϦϯάͷίετ ɾ7JFXͷݺͼग़͠ ɾ਌͕ࢠΛଌఆ NFBTVSF 3PPU 7JFX 7JFX 7JFX 7JFX 7JFX 7JFX 7JFX ɾ࠶ؼత ɾSPPUͷαΠζ͕ܾఆ ɾը໘্ͷҐஔΛܾఆ MBZPVU ɾ༿ϊʔυͷҐஔ͕ܾఆ

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ιϑτ΢ΣΞඳըͱHWA ɾ$16PS(16 ඳըํ๏ ιϑτ΢ΣΞඳը HWA Invalidate Canvas ผϨΠϠʔ શͯͷϊʔυʹӨڹ dirtyͷΈߋ৽

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Πϝʔδ $BOWBT ιϑτ΢ΣΞඳը HWA →શߋ৽ →dirtyͷΈ $BOWBT ϋʔυ΢ΣΞ ϨΠϠʔ dirty

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ɾਂ͍View֊૚ ɾιϑτ΢ΣΞඳըʹ͓͚ΔonDraw() ɾOverdrawingʹΑΔGPU࣌ؒͷফඅ ࣮૷্ͷ໰୊

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Ұ୴πʔϧΛ࢖ͬͯΈΔ

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ɾ։ൃऀΦϓγϣϯ ɹɾGPUϨϯμϦϯάͷϓϩϑΝΠϧ࡞੒ ɹɾGPUΦʔόʔυϩʔΛσόοά ɹɾGPUදࣔͷߋ৽Λදࣔ ϨϯμϦϯάͷσʔλղੳπʔϧ ɾLayoutInspector

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ɾLayoutͷώΤϥϧΩʔΛRuntimeͰղੳ͢ΔͨΊͷπʔ ϧɻxmlɺ·ͨ͸ಈతੜ੒ͨ͠ViewͳͲͷ֊૚ߏ଄͕Θ͔Β ͳ͍ࡍʹར༻͢Δɻ ɾTools -> LayoutInspector͔Β࣮ߦͰ͖Δ ɾproject_root/capturesʹRuntimeͷεφοϓγϣοτ͕อଘ͞ΕΔ LayoutInspector

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όʔδϣϯ؅ཧ(6*࣮૷ߏ଄ϓϩύςΟ Captureͷ੾Γସ͑ Viewߏ଄ ※) staging؀ڥͷͨΊdebug tool view͕දࣔ͞Ε͍ͯΔ ViewϓϩύςΟ αϯϓϧ

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ɾGPUϨϯμϦϯάͷϓϩϑΝΠϧ࡞੒ ɾGPUϨϯμϦϯάͷϓϩηεຖͷίετ ɾGPUΦʔόʔυϩʔΛσόοά ɾGPUϨϯμϦϯάͷOverdraw ɾGPUදࣔͷߋ৽Λදࣔ ɾGPUϨϯμϦϯάߋ৽৔ॴͷಛఆ ։ൃऀΦϓγϣϯ

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։ൃऀΦϓγϣϯ GPUϓϩϑΝΠϧ GPUΦʔόʔυϩʔ - ࢵɺԫ྘ͷΤϦΞ GPUදࣔͷߋ৽ - ੺͍ਖ਼ํܗ 16msϥΠϯ 1frame αϯϓϧ

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'J/$ΞϓϦʹࢼͯ͠ΈΔ

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'J/$ΞϓϦͷར༻ස౓͕ߴ͍ը໘Ͱଌఆ ɾ੺͍৭͸Overdrawճ਺͕4ճΛ௒͑Δ΋ͷɻ ɾఆظ࣮ߦΞχϝʔγϣϯ͕૸Δ౓ʹɺGPU Profilerͷ੺ ͍όʔ͕௓Ͷ্͕Δ ɾఆظ࣮ߦΞχϝʔγϣϯΛࢭΊͯ΋ɺͳ͔ͥ਺ඵຖʹը ໘ͷ΢Οϯυ΢͕఺໓͠ɺΞοϓσʔτ͕૸ͬͯ͠·͏ɻ ɾGPU Profilerͷ੨͍όʔ͕େ͖͍ɻ ϨϯμϦϯάύϑΥʔϚϯεଌఆ

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ύϑΥʔϚϯεͷج४Λઃஔ͢Δ ج४Λઃఆ͢Δ ɾແବͳվળΛ͠ͳ͍ͨΊ ɾఆྔత͕೉͚͠Ε͹ɺج४Λ࡞Δ ɾߴ඼࣭ΞϓϦ ɾಉػೳΞϓϦ

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*OTUBHSBNͱͷൺֱ ՄೳͳݶΓಉ৚݅ ɾ੺͍όʔ͸ಉ͡ఔ౓ ɾ੨͍όʔ͕શମతʹߴ͍ɻ ɾશମతʹOverdraw͕গͳ͍ɻ ɹɾView֊૚͕গͳ͍ ɹɾແବͳΞϧϑΝ͕ͳ͍ ɹɾద੾ͳΫϦοϐϯάॲཧ ߴ඼࣭ΞϓϦͱͷൺֱ

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ɾOverdraw RecyclerViewͷitemViewͷ༨෼ͳView֊૚ ɾGPU Profiler ɾ੨͍όʔ͕େ͖͍ = onDraw()ͷDisplayListੜ੒ͷίετɻ onDraw()ͷස౓ɺoff-screenͷϨϯμϦϯάɺonDraw()ͷॲཧ͕ॏ͍ ɾGPUඳըͷߋ৽ ɾఆظ࣮ߦΞχϝʔγϣϯͷίετ ɹɾFiNCͪΌΜ(ΞΠίϯ) ۩ମతͳ໰୊఺

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ɾෆཁͳbackgroundͷ࡟আ Overdraw΁ͷରԠ ɾਂ͍ViewΛઙ͘͢Δ

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Viewίϯςφʹແବͳ֊૚͸ͳ͍͔ʁ ෆཁͳbackgroundͷ࡟আ TextView FrameLayout RecyclerView

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ɾxml্ͰແବͳViewίϯςφΛ࡞Βͳ͍ ਂ͍ViewΛઙ͘͢Δ ɾಈతʹ௥Ճ͢Δ৔߹Ͱ΋ɺmergeΛݕ౼ ɾConstraintLayoutΛར༻͢Δ

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վળ݁Ռ վળલ վળޙ

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ɾPO%SBX಺ͰͷϝϞϦΞϩέʔτېࢭ GPUϨϯμϦϯά΁ͷରԠ ɾPO%SBX಺ͰͷMPPQॲཧͷվળ ɾPGGTDSFFOϨϯμϦϯάͷఀࢭ

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PO%SBX͸ίετ͕ߴ͍ ɾෆมΦϒδΣΫτ͸ɺελοΫྖҬʹల։͢Δ Before onDraw಺ͰͷϝϞϦΞϩέʔτېࢭ ɾGC͕ߴ͍ස౓Ͱ૸ͬͯ͠·͏ After

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MPPQͷ$BOWBTૢ࡞͸ίετ͕ߴ͍ ɾGPUϨϯμϦϯά͸GPU΁ͷΦϒδΣΫτΛੜ੒͢Δ onDraw಺Ͱͷloopॲཧͷվળ ɾCanvas#drawLineͰloopͰ͸ͳ͘ɺCanvas#drawLinesΛ࢖͏

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PGGεΫϦʔϯ࣌ͷॲཧΛࢭΊΔ off-screenͷϨϯμϦϯάͷېࢭ ɾBVUPTMJEF͕ద༻ ɾλϒ ΧελϜ7JFX1BHFS Ҡಈ࣌ʹࢭΊΔ ɾWJTJCMF6TFS)JOU

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ఆظ࣮ߦΞχϝʔγϣϯͷ࣮ߦ GPUඳըͷߋ৽ ˠΧελϜϏϡʔͷ)8"Λ༗ޮʹ

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ɾ6*ͷجૅΛֶͼɺΞϯνύλʔϯΛ౿·ͳ͍ UIվળͷ·ͱΊ ɾ5PPMΛద੾ʹ࢖͍ɺύϑΥʔϚϯεΛվળ

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6*ͷվળ σʔλ௨৴ྔ όοςϦʔফඅ ύϑΥʔϚϯενϡʔχϯά࣮ફ

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Ωϟογϡͷར༻ σʔλ௨৴ྔΛ࡟ݮ͢ΔͨΊʹ ωοτϫʔΫ Packet Packet Packet ը૾σʔλͷ࡟ݮ ม׵ γϦΞϥΠθʔγϣϯ

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Ωϟογϡͷར༻

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ϝϞϦ Ωϟογϡͱ͸ʁ σʔλͷϩʔυΛߴ଎Խ͢ΔͨΊͷ࢓૊Έ σΟεΫ

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Ϣʔεέʔεʹ߹Θͤͯ࢖͏ σʔλอ࣋ظؒ ϝϞϦΩϟογϡ σΟεΫΩϟογϡ ࣮ߦεϨου ΞϓϦϓϩηε Πϯετʔϧத ͲͷεϨουͰ΋ྑ͍ ϫʔΧʔεϨου อଘྖҬ গͳ͍ ଟ͍ ϝϞϦ vs σΟεΫΩϟογϡ

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ɾϝϞϦΩϟογϡ༻ͷAndroidఏڙΫϥε →࢖༻ՄೳϝϞϦ্ݶͷνΣοΫ →্ه͔ΒLruCacheͷར༻ՄೳϝϞϦྔΛׂΓ౰ͯ ࢀߟ) https://developer.android.com/topic/performance/graphics/cache-bitmap ɾ࢖༻ස౓͕௿͍σʔλΛ࡟আ͍ͯ͘͠ LruCacheΛ༻͍ͨϝϞϦΩϟογϡ

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ɾσΟεΫ: ετϨʔδͷ2%ΛׂΓ౰ͯ (5MBʙ50MBͷൣғ಺) ࢀߟ) https://github.com/square/picasso/blob/master/picasso/src/main/java/com/squareup/picasso3/Utils.java#L163-L182 ɾsquareࣾͷը૾ϩʔυ&ΩϟογϡͷϥΠϒϥϦ ࢀߟ) https://github.com/JakeWharton/picasso2-okhttp3-downloader/blob/master/src/main/java/com/jakewharton/picasso/OkHttp3Downloader.java ɾΧελϜΩϟογϡ(Okhttp3) ɾϝϞϦ: ώʔϓྖҬͷ15%ΛׂΓ౰ͯ ࢀߟ) https://github.com/square/picasso/blob/master/picasso/src/main/java/com/squareup/picasso3/Utils.java#L184-L190 PicassoΛ༻͍ͨϝϞϦ/σΟεΫΩϟογϡ

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Ωϟογϡ͸ೋछྨ͋ΓɺϝϞϦ͸شൃੑɺσΟε Ϋ͸ෆشൃੑ Ωϟογϡ͸σʔλ΁ͷΞΫηεΛߴ଎Խ͢Δ Ωϟογϡར༻ͷ·ͱΊ →σʔλϩʔυͷͨΊͷωοτϫʔΫॲཧճ਺͕ݮ গ͠ɺύϑΥʔϚϯε͕޲্͢Δɻ

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Ωϟογϡͷར༻ σʔλ௨৴ྔΛ࡟ݮ͢ΔͨΊʹ ωοτϫʔΫ Packet Packet Packet ը૾σʔλͷ࡟ݮ ม׵ γϦΞϥΠθʔγϣϯ

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γϦΞϥΠθʔγϣϯ

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ྫ) ɾAPI௨৴ͰͷKotlin 㲗 JSON ɾΩϟογϡ࣌ͷϑΝΠϧॻ͖ࠐΈ ௚ྻԽͷ͜ͱɻಛఆͷ؀ڥʹґଘͨ͠ΦϒδΣΫτ ΛόΠτྻʹม׵͢Δ͜ͱ γϦΞϥΠθʔγϣϯͱ͸ʁ ม׵

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γϦΞϥΠθʔγϣϯͷύϑΥʔϚϯε ϝϦοτ ςΩετ(JSON, XML) όΠφϦʔܗࣜ Մಡੑ͕ߴ͍ σϝϦοτ ແବͳσʔλ͕ଟ͍ σʔλྔ͕গͳ͍ Մಡੑ͕௿͍ ςΩετ vs όΠφϦʔ

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+40/ͰͷςΩετܗࣜ ɾςΩετϕʔεͷܗࣜ͸৑௕Ͱσʔλྔ͕ଟ͘ͳΔ { “id”: 0, “name”: “bison”, “image”: “https://bisonworks/bisons/1/image” } ۭന Ϧλʔϯ ࢀর JSON

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ɾprotoϑΝΠϧΛఆٛ →ίϯύΠϧ →ݴޠ͝ͱͷߏ଄ମͷੜ੒ ɾόΠφϦܗࣜͰγϦΞϥΠζ͞ΕΔɻ ɾෳ਺ݴޠؒͰͷҰ؏ੑΛอͯΔ ɾprotoϑΝΠϧ͸Մಡੑ΋ߴ͍ message Animal { required string name = 1; required int32 id = 2; optional string image =3; } Protocol Buffers

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ɾςΩετܗࣜ(JSON, XML)͸Մಡੑ͸ߴ͍͕ɺσʔλྔ͸ଟ͍ ɾόΠφϦʔܗࣜ͸Մಡੑ͸௿͍͕ɺσʔλྔ͸গͳ͍ɻ ɾProtocol Buffers͸DSLͷΑ͏ͳ΋ͷͰɺՄಡੑ͕ߴ͘ɺ ͔ͭૹड৴࣌ͷγϦΞϥΠζ͞Εͨσʔλྔ΋গͳ͍ γϦΞϥΠθʔγϣϯͷ·ͱΊ →Protocol BufferͰՄಡੑߴ͘ɺσʔλྔ͕গͳ͍γϦ ΞϥΠζΛߦ͏

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Ωϟογϡͷར༻ σʔλ௨৴ྔΛ࡟ݮ͢ΔͨΊʹ ωοτϫʔΫ Packet Packet Packet ը૾σʔλͷ࡟ݮ ม׵ γϦΞϥΠθʔγϣϯ

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ը૾σʔλͷ࡟ݮ

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ը૾ϑΥʔϚοτʹؔͯ͠ ը૾ͷϑΥʔϚοτʹ஫ҙ͢Δ ɾσʔλྔ͕ஶ͘͠มΘΔ ɾը૾ͷΫΦϦςΟ͕มΘΔ

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ը૾ϑΥʔϚοτνʔτγʔτ ࢀߟ IUUQTEFWFMPQFSBOESPJEDPNUPQJDQFSGPSNBODFOFUXPSLYGFS

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WebPͷύϑΥʔϚϯε Մٯѹॖͷ৔߹ɺPNGΑΓ26%খ͍͞ ෆՄٯѹॖͷ৔߹ɺJPEGΑΓ25-34%খ͍͞ ࢀߟ IUUQTEFWFMPQFSTHPPHMFDPNTQFFEXFCQ

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WebPҎ֎ͷ৔߹ PNG͔JPEG͔

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PNGͱJPEG PNG JPEG ɾಁաʹରԠ ɾՄٯѹॖ ɾෆՄٯѹॖ

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Ϣʔεέʔε PNG JPEG ɾγϯϓϧͳը૾ ɾෳࡶͳը૾ Α͘ݴΘΕΔը૾ͷ࢖͍෼͚

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γϯϓϧͳը૾ͷఆٛͱ͸

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γϯϓϧͳը૾ PNG JPEG ɾෳࡶͳۂઢ͕ଘࡏ͠ͳ͍ܗ ɾ৭ͷόϦΤʔγϣϯ͕গͳ͍ ɾෳ਺ͷ৭ͷόϦΤʔγϣϯ ɾෳࡶͳۂઢ

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ͳ͔ͥʁ

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PNGѹॖͷΞϧΰϦζϜ(Indexed Format) RGBΛࢀর͢Δܗʹมߋ͢Δ ɾը૾͸ϐΫηϧ͝ͱʹRGB৘ใΛ࣋ͭ ɾ8bit(256֊ௐ) * 3 = 24bit = 2^24 ≒ 1600ສ৭ ɾϐΫηϧ͕࣋ͭ৘ใ͸IndexͷΈ ɾΧϥʔύϨοτΛ࣋ͭ(্ݶΛઃ͚Δ)

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୯ҐϐΫηϧͷ৘ใྔ͕ܹݮ͢Δ ύϨοτ਺͸2,4,16,256͕ࢦఆͰ͖Δ ɾ1byteͰදݱͰ͖Δ 24bit = 3bytes 1byte

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JPEGͷΞϧΰϦζϜ 8ϐΫηϧ͝ͱͷϒϩοΫʹ෼͚ͯॲཧ ϒϩοΫ಺Ͱ৘ใΛϑΟϧλϦϯά͢Δ

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௚ઢతͳڥքʹऑ͍ ڥք͕ΑΓ௚ઢͩͱը࣭͕ѱ͘ͳΔ 8pixel

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໨ࢹνΣοΫ ਓؒͷ໨͸͍͍Ճݮ ໨ࢹνΣοΫͰσʔλྔͷ࡟ݮΛʂ

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ը૾σʔλ࡟ݮͷ·ͱΊ WebPରԠ͍ͯ͠Ε͹WebPͷҰ୒ JPEGɺPNGͷσʔλྔΛཧղ͢Δɻ ͦͷ্Ͱ࣮ࡍͷ໨Ͱ֬ೝͯ͠ѹॖ͢Δɻ

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6*ͷվળ σʔλ௨৴ྔ όοςϦʔফඅ ύϑΥʔϚϯενϡʔχϯά࣮ફ

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ɾϓϩηοα(ϋʔυ)Ͱిྲྀ͕ྲྀΕΔ ɾOS(ιϑτ)͕CPUͷϞʔυมߋΛߦ͏ → CPUϞʔυΛ௿͘อͭ όοςϦʔফඅΛ࡟ݮ͢ΔͨΊʹ

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$16͸ిྗΛޮ཰తʹ࢖͓͏ͱ͢Δ CPUʹ͸Ϟʔυ͕͋Δ

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࣍ͷॲཧʹඋ͑Δ,FFQ"XBLFͷίετ ϞόΠϧ௨৴࣌ͷফඅిྗ

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ϞόΠϧ௨৴Λࡉ੾Εʹͨ͘͠ͳ͍

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όονॲཧͱ͸ʁ ෼ࢄͨ͠λεΫΛಉ࣌ʹ࣮ߦ͢Δ͜ͱɻΦʔόʔϔουΛݮগͤ͞Δɻ Task Before After Executed Task Executed Task Executed Task Task Task Executed 1 1 1 1 ϞόΠϧ௨৴࣌ͷফඅిྗ

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αʔόʔͱͷσʔλͷಉظੑ͕ݫີͰͳ͍΋ͷ ࠷ѱɺσʔλ͕ࣦΘΕͯ΋໰୊͕ͳ͍΋ͷ ෼ੳϩάσʔλ ఆظతͳσʔλͷಉظ ϞόΠϧʹ͓͚Δόονॲཧ

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ɾJobSchedulerͱAlertManagerΛOSόʔδϣϯͰ࢖͍෼͚ ɾෳ਺λεΫͷνΣΠϯ ɾδϣϒʹ੍ݶΛ͚ͭΒΕΔ ɾόοςϦʔফඅ/ωοτϫʔΫঢ়ଶ/ॆిঢ়ଶ/CPUͷঢ়ଶ/ετϨʔδͷۭ͖ ɾ஗ԆͰ͖Δ(Deferrable)ఆظత/ϫϯλΠϜͳδϣϒʹ࢖͏ WorkManager ɾόοΫΦϑ(ࢦ਺ؔ਺తස౓)αϙʔτ

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ϘτϧωοΫΛ୳Γ͍ͨ

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#BUUFSZ)JTUPSJBO ୺຤ͷόοςϦʔফඅྔΛՄࢹԽग़དྷΔπʔϧ 1. OverViewͷάϥϑ ɾ߲໨ΛϐοΫͨ͠ΧελϜάϥϑ΋Ͱ͖Δ 2. App Selection ɾΞϓϦ/߲໨ͰϑΟϧλՄೳ 3. Tables ɾΞϓϦؒൺֱ/ώετϦʔ(ྦྷੵσʔλ)/ΞϓϦελοπ 4. ݁Ռ ɾϑΟϧλ݁ՌΛදࣔ͢Δ σʔλղੳπʔϧ

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ɾ୺຤ͷి஑ফඅྔΛՄࢹԽग़དྷΔπʔϧ ɾDocker্Ͱಈ͘(Α͏ʹͳͬͯΔʂ) 1. OverViewͷάϥϑ 2. App Selection 3. Tables 4. ݁Ռ Battery Historianͷશମతͳߏ੒

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ɾެࣜ: https://github.com/google/battery-historian EPDLFSSVOQQPSUHDSJPBOESPJECBUUFSZIJTUPSJBOTUBCMFQPSU ɾ͸ԿͰ΋Α͍ɻ9999ͱ͔ʹ͓ͯ͘͠ IUUQMPDBMIPTUQPSU ɾAndroid୺຤಺ʹbugreportsͷdir͕͋Δ adb bugreport bugreport.zip ※) ެࣜͷͰΤϥʔ͕ग़Δਓ͸ී௨ʹabdͰϑΝΠϧసૹ͍ͯͩ͘͠͞ɻ ؀ڥߏங

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Battery Level͸1ࠁΈͳͷͰɺ୹͍෦෼͕ফඅిྗ͕ߴ͍෦෼ όοςϦʔͷղੳํ๏

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CPUͷϞʔυ ϞόΠϧ௨৴͸ίετ͕ߴ͍ όοςϦʔͷղੳํ๏

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ܧଓతଌఆ͕೉͍͠

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ܦݧ্ɺٙͬͯΈΔͱྑͦ͞͏ͳ͜ͱ όοΫάϥ΢ϯυͰఆظతͳॲཧΛ࣮ߦ͍ͯ͠Δ ը໘্Ͱଟ͘ͷωοτϫʔΫॲཧΛߦ͍ͬͯΔλεΫ ఆੑతʹ΋Ξϓϩʔν͢Δ ɾස౓ɺॏ͍ॲཧ ɾෆద੾ͳϥΠϑαΠΫϧ(onResumeͳͲ)Ͱͷίʔϧ

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CPUͷϞʔυ(awake, sleep)ΛSleep΁ ϞόΠϧ௨৴͸஗ԆΛݕ౼͢Δ ఆྔͱఆੑతͳ྆໘͔ΒΞϓϩʔν͢Δ όοςϦʔফඅͷ࠷దԽ·ͱΊ

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RailsςοΩʔͳ࿩ ϚΠΫϩαʔϏεͷཁૉٕज़ͷ࿩ Ϛωδϝϯτͷ࿩ શମతͳ·ͱΊ

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શମతͳ·ͱΊ ࠶ݱੑ͕௿͍ύϑΥʔϚϯε໰୊ʹରॲ͢Δ ύϑΥʔϚϯεͷલఏ஌ࣝΛ͚ͭɺఆੑͱఆྔͱͷ ྆ྠ͔ΒΞϓϩʔν͍ͯ͘͠