Androidにおけるパフォーマンスチューニング実践

"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࿩
Ϛωδϝϯτͷ࿩
ΞϓϦύϑΥʔϚϯενϡʔχϯά࣮ફ

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6*ͷվળ
σʔλ௨৴ྔ
όοςϦʔফඅ

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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)[email protected]#8R:U7*S';8S#;D#@XG98

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NTGSBNFΛӽ͑ͯ͠·͏
→Frame͕Drop͞ΕΔ
16ms
UI
Drawing
LameWork
App
Events
UI
Drawing
UI
Drawing
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
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

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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༻
ωοτϫʔΫ
Packet
Packet
Packet
ը૾σʔλͷ࡟ݮ
ม׵

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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༻
ωοτϫʔΫ
Packet
Packet
Packet
ը૾σʔλͷ࡟ݮ
ม׵

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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

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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࿩
Ϛωδϝϯτͷ࿩
શମతͳ·ͱΊ

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

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Androidにおけるパフォーマンスチューニング実践

Androidにおけるパフォーマンスチューニング実践

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