20181107_off_the_main_thread.pdf

P⒎UIFNBJOUISFBE

໨࣍ P⒎UIFNBJOUISFBE 8FCΞϓϦͷUISFBEͱCMPDLJOH Πϕϯτϧʔϓͷ࢓૊Έ σϞ
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P⒎UIFNBJOUISFBE

P⒎UIFNBJOUISFBEͱ͸ w ௚༁͢ΔͱʮϝΠϯεϨου͔Β֎͢ʯ w 8FCΞϓϦʹ͓͍ͯϝΠϯεϨουҎ֎ͰॲཧΛ࣮ߦ͢Δ͜ͱ

ͳͥP⒎UIFNBJOUISFBE͕ඞཁʁ w ϒϥ΢β্ͷॲཧ͸جຊతʹγϯάϧεϨου w ॏ͍ॲཧΛ࣮ߦ͢Δͱ69͕ѱԽ͢Δ w ΫϦοΫ΍εΫϩʔϧͷ൓Ԡ͕ಷ͘ͳΔ w %0.ૢ࡞͕Ͱ͖Δͷ͸ϝΠϯεϨου͚ͩͳͷͰॏ͍ͨॲཧ͸ ผͷεϨουͰॲཧ͍ͨ͠

P⒎UIFNBJOUISFBEΛͲ͏࣮ݱ͢Δ͔ w 8FC8PSLFSΛ࢖͏ w ࣮૷ํ๏͸σϞͷιʔεղઆͰ

8FCΞϓϦͷUISFBEͱCMPDLJOH

՝୊ͷ੔ཧ w ϒϥ΢β্ͷॲཧ͸γϯάϧεϨου w ॏ͍ॲཧΛ࣮ߦ͢ΔͱϢʔβͷૢ࡞͕ϒϩοΫ͞ΕΔ w 8FC8PSLFSΛ࢖͏͜ͱͰϚϧνεϨουͰॲཧͰ͖Δ

αϯϓϧΞϓϦ w αϯϓϧΞϓϦͷ಺༰ ϘλϯΛԡ͢ ΧϥʔίʔυΛੜ੒͢Δ EΈ͍ͨͳ΍ͭ
Ϙλϯͷ৭ΛΛੜ੒ͨ͠Χϥʔίʔυʹมߋ͢Δ

αϯϓϧΞϓϦ֓ཁ ኮᶎ πЄϖ

ਖ਼ৗύλʔϯ w ୯ʹ৭Λมߋ͢Δ͚ͩ w ಛʹ໰୊͸ൃੜ͠ͳ͍

ਖ਼ৗύλʔϯ

ਖ਼ৗύλʔϯ JECVUUPOͷཁૉΛ

ਖ਼ৗύλʔϯ JECVUUPOͷཁૉΛ ΫϦοΫͨ͠Β PO$MJDLΛ࣮ߦ

ਖ਼ৗύλʔϯ JECVUUPOͷཁૉΛ ΫϦοΫͨ͠Β PO$MJDLΛ࣮ߦ HFOFSBUF$PMPS$PEFͷ໭Γ஋Λ CVUUPOͷഎܠ৭ʹηοτ

ਖ਼ৗύλʔϯ JECVUUPOͷཁૉΛ ΫϦοΫͨ͠Β PO$MJDLΛ࣮ߦ HFOFSBUF$PMPS$PEFͷ໭Γ஋Λ CVUUPOͷഎܠ৭ʹηοτ ΧϥʔίʔυΛੜ੒ͯ͠ฦ͢

CMPDLJOH͢Δύλʔϯ w Χϥʔίʔυੜ੒ॲཧʹࡉ޻Λ ͯ͠ඵ͔͔ΔΑ͏ʹͨ͠ w ॲཧ͕׬ྃ ඵܦա ͔ͯ͠ ΒϘλϯͷ৭͕มߋ͞ΕΔ w
଴ͨ͞Ε͍ͯΔؒ͸ਖ਼ৗύλʔ ϯΛԡͯ͠΋৭͸มΘΒͳ͍ w #MPDLJOH͞ΕͯΔ

CMPDLJOH͢Δύλʔϯ

CMPDLJOH͢Δύλʔϯ JECVUUPOͷཁૉΛ

CMPDLJOH͢Δύλʔϯ JECVUUPOͷཁૉΛ ΫϦοΫͨ͠Β PO$MJDLΛ࣮ߦ

CMPDLJOH͢Δύλʔϯ JECVUUPOͷཁૉΛ ΫϦοΫͨ͠Β PO$MJDLΛ࣮ߦ HFOFSBUF$PMPS$PEFͷ໭Γ஋Λ CVUUPOͷഎܠ৭ʹηοτ

CMPDLJOH͢Δύλʔϯ JECVUUPOͷཁૉΛ ΫϦοΫͨ͠Β PO$MJDLΛ࣮ߦ HFOFSBUF$PMPS$PEFͷ໭Γ஋Λ CVUUPOͷഎܠ৭ʹηοτ Կ΋͠ͳ͍XIJMFจΛ NTؒճ͠ଓ͚Δ

CMPDLJOH͢Δύλʔϯ JECVUUPOͷཁૉΛ ΫϦοΫͨ͠Β PO$MJDLΛ࣮ߦ HFOFSBUF$PMPS$PEFͷ໭Γ஋Λ CVUUPOͷഎܠ৭ʹηοτ Կ΋͠ͳ͍XIJMFจΛ NTؒճ͠ଓ͚Δ
ΧϥʔίʔυΛੜ੒ͯ͠ฦ͢

P⒎UIFNBJOUISFBEύλʔϯ w ඵ͔͔ΔΧϥʔίʔυੜ੒ॲཧΛผ εϨουͰ࣮ߦ͢ΔΑ͏ʹͨ͠ w ॲཧ͕׬ྃ ඵܦա ͔ͯ͠ΒϘλϯ ͷ৭͕มߋ͞ΕΔ͜ͱ͸มΘΒͳ͍ w
଴ͨ͞Ε͍ͯΔؒʹਖ਼ৗύλʔϯͷϘ λϯΛԡ͢ͱ࣮ߦ͞Εͯ৭͕มΘΔʂ w #MPDLJOH͞Ε͍ͯͳ͍

P⒎UIFNBJOUISFBEύλʔϯ Worker.js

P⒎UIFNBJOUISFBEύλʔϯ Worker.js 8PSLFSΛੜ੒͠  ผεϨουΛ্ཱͪ͛Δ

P⒎UIFNBJOUISFBEύλʔϯ Worker.js 8PSLFSΛੜ੒͠  ผεϨουΛ্ཱͪ͛Δ JECVUUPOͷཁૉΛ

P⒎UIFNBJOUISFBEύλʔϯ Worker.js 8PSLFSΛੜ੒͠  ผεϨουΛ্ཱͪ͛Δ JECVUUPOͷཁૉΛ ΫϦοΫͨ͠Β PO$MJDLΛ࣮ߦ

P⒎UIFNBJOUISFBEύλʔϯ Worker.js 8PSLFSΛੜ੒͠  ผεϨουΛ্ཱͪ͛Δ JECVUUPOͷཁૉΛ ΫϦοΫͨ͠Β PO$MJDLΛ࣮ߦ 8PSLFSʹϝοηʔδૹ৴

ϝοηʔδΛड৴ͨ͠Β PO.FTTBHFΛ࣮ߦ

ϝοηʔδΛड৴ͨ͠Β PO.FTTBHFΛ࣮ߦ ϝοηʔδ͕HFOFSBUFDPMPSͩͬͨΒ HFOFSBUF$PMPS$PEFΛݺͼग़͢

ϝοηʔδΛड৴ͨ͠Β PO.FTTBHFΛ࣮ߦ ϝοηʔδ͕HFOFSBUFDPMPSͩͬͨΒ HFOFSBUF$PMPS$PEFΛݺͼग़͢ HFOFSBUF$PMPS$PEF͸͖ͬ͞ͱಉ͡ ඵؒϒϩοΩϯάͯ͠ ΧϥʔίʔυΛฦ͢

ϝοηʔδΛड৴ͨ͠Β PO.FTTBHFΛ࣮ߦ ϝοηʔδ͕HFOFSBUFDPMPSͩͬͨΒ HFOFSBUF$PMPS$PEFΛݺͼग़͢ HFOFSBUF$PMPS$PEF͸͖ͬ͞ͱಉ͡ ඵؒϒϩοΩϯάͯ͠ ΧϥʔίʔυΛฦ͢ ੜ੒ͨ͠ΧϥʔίʔυΛ ϝΠϯεϨουʹฦ٫

ϝοηʔδΛड৴ͨ͠Β PO.FTTBHFΛ࣮ߦ ϝοηʔδ͕HFOFSBUFDPMPSͩͬͨΒ HFOFSBUF$PMPS$PEFΛݺͼग़͢ HFOFSBUF$PMPS$PEF͸͖ͬ͞ͱಉ͡ ඵؒϒϩοΩϯάͯ͠ ΧϥʔίʔυΛฦ͢ ੜ੒ͨ͠ΧϥʔίʔυΛ ϝΠϯεϨουʹฦ٫ 8PSLFS͔ΒϝοηʔδΛड৴͢Δͱ PO.FTTBHFΛ࣮ߦ

ϝοηʔδΛड৴ͨ͠Β PO.FTTBHFΛ࣮ߦ ϝοηʔδ͕HFOFSBUFDPMPSͩͬͨΒ HFOFSBUF$PMPS$PEFΛݺͼग़͢ HFOFSBUF$PMPS$PEF͸͖ͬ͞ͱಉ͡ ඵؒϒϩοΩϯάͯ͠ ΧϥʔίʔυΛฦ͢ ੜ੒ͨ͠ΧϥʔίʔυΛ ϝΠϯεϨουʹฦ٫ 8PSLFS͔ΒϝοηʔδΛड৴͢Δͱ PO.FTTBHFΛ࣮ߦ 8PSLFS͔Βड৴ͨ͠ΧϥʔίʔυΛ  CVUUPOͷഎܠ৭ʹηοτ

ࢀߟ w $ISPNFͷEFWUPPMTΛ࢖͏ͱͲͷεϨουͰॲཧ͕ಈ͍͍ͯΔ͔ ֬ೝͰ͖Δ blockingͯΡϞόЄЀ workerΨֵ͜ϞόЄЀ

͜͜·Ͱͷ·ͱΊ w ϒϥ΢β্ͷॲཧ͸γϯάϧεϨουͰ࣮ߦ͞ΕΔ w ϝΠϯεϨουͰॏ͍ॲཧΛ࣮ߦ͢ΔͱϢʔβૢ࡞͕ϒϩοΩϯ ά͞Εͯ69͕ѱԽ͢Δ w ॏ͍ॲཧΛ8PSLFSͰॲཧ͢Δ͜ͱͰϝΠϯεϨουͷϒϩοΩ ϯάΛ๷͛Δ w
͜Ε͕P⒎UIFNBJOUISFBEͷҙٛʂ

Πϕϯτϧʔϓͷ࢓૊Έ

+BWB4DSJQUͷॲཧͷ࢓૊Έ w ॲཧ͕ൃੜ͢ΔͱλεΫͱͯ͠Ωϡʔʹ௥Ճ͞ΕΔ w Πϕϯτϧʔϓͱ͍͏ϥΠϑαΠΫϧͰΩϡʔΛνΣοΫ͢Δ w Ωϡʔʹॲཧ͕ೖ͍ͬͯΕ͹࣮ߦ͢Δ 㳌ቘ͢咲ኞͭ͵Ο
κϲЄ΁᭄ےͫ΢Ρ αϦЀϕϸЄϤ όφμΨ殼ኾ΁ 䋚ᤈͭͼ͚ͥ ݫີʹ͸΋ͬͱෳࡶͰ͕͢ ؆ུԽ͢ΔͱਤͷΑ͏ͳײ͡ όφμ

۩ମྫʹ౰ͯ͸ΊΔ w ষͰݟͤͨαϯϓϧΞϓϦΛ࢖ͬͯॲཧͷྲྀΕΛݟͯΈΔ

ਖ਼ৗύλʔϯ ࠶ܝ w ϘλϯΛΫϦοΫ͢Δͱ എܠ৭͕มΘΔ

ਖ਼ৗύλʔϯ w ॲཧͷྲྀΕ w ϘλϯΛΫϦοΫ͢Δ w λεΫ͕Ωϡʔʹ௥Ճ͞ΕΔ w ΫϦοΫ࣌ͷॲཧ͕࣮ߦ͞ΕΔ w
എܠ৭͕ը໘ʹ൓ө͞ΕΔ

എܠ৭͕ը໘ʹ൓ө͞ΕΔ αϦЀϕϸЄϤ όφμ όφμ咲ኞ

എܠ৭͕ը໘ʹ൓ө͞ΕΔ αϦЀϕϸЄϤ κϲЄ΁فΡ

എܠ৭͕ը໘ʹ൓ө͞ΕΔ αϦЀϕϸЄϤ όφμ͢䋚ᤈͫ΢Ρ

എܠ৭͕ը໘ʹ൓ө͞ΕΔ αϦЀϕϸЄϤ 䋚ᤈ奾ຎ͢ݍฉͫ΢Ρ

CMPDLJOH͢Δύλʔϯ ࠶ܝ w ϘλϯΛΫϦοΫ͢Δͱඵޙʹ৭ ͕มΘΔ w ඵͷؒʹਖ਼ৗύλʔϯͷϘλϯΛ ԡͯ͠΋৭͸มΘΒͳ͍ w ඵܦաޙʹ΄΅ಉ࣌ʹͭͷϘλ
ϯͷ৭͕มΘΔ

CMPDLJOH͢Δύλʔϯ w ॲཧͷྲྀΕ w ˒CMPDLJOHύλʔϯͷϘλϯΛΫϦοΫ w ˒λεΫ͕Ωϡʔʹ௥Ճ͞ΕΔ w ˒ΫϦοΫ࣌ͷॲཧ͕࣮ߦ͞ΕΔ w
˗ਖ਼ৗύλʔϯͷϘλϯΛΫϦοΫ w ˗λεΫ͕Ωϡʔʹ௥Ճ͞ΕΔ w ˒എܠ৭͕ը໘ʹ൓ө͞ΕΔ w ˗ΫϦοΫ࣌ͷॲཧ͕࣮ߦ͞ΕΔ w ˗എܠ৭͕ը໘ʹ൓ө͞ΕΔ

˗ਖ਼ৗύλʔϯͷϘλϯΛΫϦοΫ w ˗λεΫ͕Ωϡʔʹ௥Ճ͞ΕΔ w ˒എܠ৭͕ը໘ʹ൓ө͞ΕΔ w ˗ΫϦοΫ࣌ͷॲཧ͕࣮ߦ͞ΕΔ w ˗എܠ৭͕ը໘ʹ൓ө͞ΕΔ αϦЀϕϸЄϤ όφμ όφμ咲ኞ

˗ਖ਼ৗύλʔϯͷϘλϯΛΫϦοΫ w ˗λεΫ͕Ωϡʔʹ௥Ճ͞ΕΔ w ˒എܠ৭͕ը໘ʹ൓ө͞ΕΔ w ˗ΫϦοΫ࣌ͷॲཧ͕࣮ߦ͞ΕΔ w ˗എܠ৭͕ը໘ʹ൓ө͞ΕΔ αϦЀϕϸЄϤ κϲЄ΁فΡ

˗ਖ਼ৗύλʔϯͷϘλϯΛΫϦοΫ w ˗λεΫ͕Ωϡʔʹ௥Ճ͞ΕΔ w ˒എܠ৭͕ը໘ʹ൓ө͞ΕΔ w ˗ΫϦοΫ࣌ͷॲཧ͕࣮ߦ͞ΕΔ w ˗എܠ৭͕ը໘ʹ൓ө͞ΕΔ αϦЀϕϸЄϤ όφμ͢䋚ᤈͫ΢Ρ ॏ͍ॲཧ

˗ਖ਼ৗύλʔϯͷϘλϯΛΫϦοΫ w ˗λεΫ͕Ωϡʔʹ௥Ճ͞ΕΔ w ˒എܠ৭͕ը໘ʹ൓ө͞ΕΔ w ˗ΫϦοΫ࣌ͷॲཧ͕࣮ߦ͞ΕΔ w ˗എܠ৭͕ը໘ʹ൓ө͞ΕΔ αϦЀϕϸЄϤ όφμ咲ኞ ॏ͍ॲཧ࣮ߦத

˗ਖ਼ৗύλʔϯͷϘλϯΛΫϦοΫ w ˗λεΫ͕Ωϡʔʹ௥Ճ͞ΕΔ w ˒എܠ৭͕ը໘ʹ൓ө͞ΕΔ w ˗ΫϦοΫ࣌ͷॲཧ͕࣮ߦ͞ΕΔ w ˗എܠ৭͕ը໘ʹ൓ө͞ΕΔ αϦЀϕϸЄϤ κϲЄ΁فΡ ॏ͍ॲཧ࣮ߦத ଴ͨ͞ΕΔ

˗ਖ਼ৗύλʔϯͷϘλϯΛΫϦοΫ w ˗λεΫ͕Ωϡʔʹ௥Ճ͞ΕΔ w ˒എܠ৭͕ը໘ʹ൓ө͞ΕΔ w ˗ΫϦοΫ࣌ͷॲཧ͕࣮ߦ͞ΕΔ w ˗എܠ৭͕ը໘ʹ൓ө͞ΕΔ 䋚ᤈ奾ຎ͢ݍฉͫ΢Ρ ଴ͨ͞ΕΔ

˗ਖ਼ৗύλʔϯͷϘλϯΛΫϦοΫ w ˗λεΫ͕Ωϡʔʹ௥Ճ͞ΕΔ w ˒എܠ৭͕ը໘ʹ൓ө͞ΕΔ w ˗ΫϦοΫ࣌ͷॲཧ͕࣮ߦ͞ΕΔ w ˗എܠ৭͕ը໘ʹ൓ө͞ΕΔ όφμ͢䋚ᤈͫ΢Ρ

˗ਖ਼ৗύλʔϯͷϘλϯΛΫϦοΫ w ˗λεΫ͕Ωϡʔʹ௥Ճ͞ΕΔ w ˒എܠ৭͕ը໘ʹ൓ө͞ΕΔ w ˗ΫϦοΫ࣌ͷॲཧ͕࣮ߦ͞ΕΔ w ˗എܠ৭͕ը໘ʹ൓ө͞ΕΔ 䋚ᤈ奾ຎ͢ݍฉͫ΢Ρ

P⒎UIFNBJOUISFBEύλʔϯ ࠶ܝ w ϘλϯΛΫϦοΫ͢Δͱඵޙʹ৭ ͕มΘΔ w ඵͷؒʹਖ਼ৗύλʔϯͷϘλϯΛ ԡ͢ͱଈ࠲ʹ৭͕มΘΔ

P⒎UIFNBJOUISFBEύλʔϯ w ॲཧͷྲྀΕ w +4ಡΈࠐΈ࣌ʹ8PSLFS͕ੜ੒͞ΕΔ w ˒P⒎UIFNBJOUISFBEύλʔϯͷϘλϯΛΫϦοΫ w ˒λεΫ͕Ωϡʔʹ௥Ճ͞ΕΔ w
˒ΫϦοΫ࣌ͷॲཧ͕࣮ߦ͞Ε8PSLFSʹλεΫ௥Ճ w ˒8PSLFSͰλεΫ͕࣮ߦ͞ΕΔ w ˗ਖ਼ৗύλʔϯͷϘλϯΛΫϦοΫ w ˗λεΫ͕Ωϡʔʹ௥Ճ͞ΕΔ w ˗ΫϦοΫ࣌ͷॲཧ͕࣮ߦ͞ΕΔ w ˗എܠ৭͕ը໘ʹ൓ө͞ΕΔ w ˒എܠ৭͕ը໘ʹ൓ө͞ΕΔ

˒ΫϦοΫ࣌ͷॲཧ͕࣮ߦ͞Ε8PSLFSʹλεΫ௥Ճ w ˒8PSLFSͰλεΫ͕࣮ߦ͞ΕΔ w ˗ਖ਼ৗύλʔϯͷϘλϯΛΫϦοΫ w ˗λεΫ͕Ωϡʔʹ௥Ճ͞ΕΔ w ˗ΫϦοΫ࣌ͷॲཧ͕࣮ߦ͞ΕΔ w ˗എܠ৭͕ը໘ʹ൓ө͞ΕΔ w ˒എܠ৭͕ը໘ʹ൓ө͞ΕΔ αϦЀϕϸЄϤ αϦЀϕϸЄϤ main thread worker thread

˒ΫϦοΫ࣌ͷॲཧ͕࣮ߦ͞Ε8PSLFSʹλεΫ௥Ճ w ˒8PSLFSͰλεΫ͕࣮ߦ͞ΕΔ w ˗ਖ਼ৗύλʔϯͷϘλϯΛΫϦοΫ w ˗λεΫ͕Ωϡʔʹ௥Ճ͞ΕΔ w ˗ΫϦοΫ࣌ͷॲཧ͕࣮ߦ͞ΕΔ w ˗എܠ৭͕ը໘ʹ൓ө͞ΕΔ w ˒എܠ৭͕ը໘ʹ൓ө͞ΕΔ αϦЀϕϸЄϤ αϦЀϕϸЄϤ main thread worker thread όφμ όφμ咲ኞ

˒ΫϦοΫ࣌ͷॲཧ͕࣮ߦ͞Ε8PSLFSʹλεΫ௥Ճ w ˒8PSLFSͰλεΫ͕࣮ߦ͞ΕΔ w ˗ਖ਼ৗύλʔϯͷϘλϯΛΫϦοΫ w ˗λεΫ͕Ωϡʔʹ௥Ճ͞ΕΔ w ˗ΫϦοΫ࣌ͷॲཧ͕࣮ߦ͞ΕΔ w ˗എܠ৭͕ը໘ʹ൓ө͞ΕΔ w ˒എܠ৭͕ը໘ʹ൓ө͞ΕΔ αϦЀϕϸЄϤ αϦЀϕϸЄϤ main thread worker thread κϲЄ΁فΡ

˒ΫϦοΫ࣌ͷॲཧ͕࣮ߦ͞Ε8PSLFSʹλεΫ௥Ճ w ˒8PSLFSͰλεΫ͕࣮ߦ͞ΕΔ w ˗ਖ਼ৗύλʔϯͷϘλϯΛΫϦοΫ w ˗λεΫ͕Ωϡʔʹ௥Ճ͞ΕΔ w ˗ΫϦοΫ࣌ͷॲཧ͕࣮ߦ͞ΕΔ w ˗എܠ৭͕ը໘ʹ൓ө͞ΕΔ w ˒എܠ৭͕ը໘ʹ൓ө͞ΕΔ αϦЀϕϸЄϤ αϦЀϕϸЄϤ main thread worker thread Worker΁㳌ቘΨ঩捏 όφμ όφμ咲ኞ

˒ΫϦοΫ࣌ͷॲཧ͕࣮ߦ͞Ε8PSLFSʹλεΫ௥Ճ w ˒8PSLFSͰλεΫ͕࣮ߦ͞ΕΔ w ˗ਖ਼ৗύλʔϯͷϘλϯΛΫϦοΫ w ˗λεΫ͕Ωϡʔʹ௥Ճ͞ΕΔ w ˗ΫϦοΫ࣌ͷॲཧ͕࣮ߦ͞ΕΔ w ˗എܠ৭͕ը໘ʹ൓ө͞ΕΔ w ˒എܠ৭͕ը໘ʹ൓ө͞ΕΔ αϦЀϕϸЄϤ αϦЀϕϸЄϤ main thread worker thread ॏ͍ॲཧ

˒ΫϦοΫ࣌ͷॲཧ͕࣮ߦ͞Ε8PSLFSʹλεΫ௥Ճ w ˒8PSLFSͰλεΫ͕࣮ߦ͞ΕΔ w ˗ਖ਼ৗύλʔϯͷϘλϯΛΫϦοΫ w ˗λεΫ͕Ωϡʔʹ௥Ճ͞ΕΔ w ˗ΫϦοΫ࣌ͷॲཧ͕࣮ߦ͞ΕΔ w ˗എܠ৭͕ը໘ʹ൓ө͞ΕΔ w ˒എܠ৭͕ը໘ʹ൓ө͞ΕΔ αϦЀϕϸЄϤ αϦЀϕϸЄϤ main thread worker thread ॏ͍ॲཧ࣮ߦத όφμ咲ኞ

˒ΫϦοΫ࣌ͷॲཧ͕࣮ߦ͞Ε8PSLFSʹλεΫ௥Ճ w ˒8PSLFSͰλεΫ͕࣮ߦ͞ΕΔ w ˗ਖ਼ৗύλʔϯͷϘλϯΛΫϦοΫ w ˗λεΫ͕Ωϡʔʹ௥Ճ͞ΕΔ w ˗ΫϦοΫ࣌ͷॲཧ͕࣮ߦ͞ΕΔ w ˗എܠ৭͕ը໘ʹ൓ө͞ΕΔ w ˒എܠ৭͕ը໘ʹ൓ө͞ΕΔ αϦЀϕϸЄϤ αϦЀϕϸЄϤ main thread worker thread ॏ͍ॲཧ࣮ߦத κϲЄ΁فΡ

˒ΫϦοΫ࣌ͷॲཧ͕࣮ߦ͞Ε8PSLFSʹλεΫ௥Ճ w ˒8PSLFSͰλεΫ͕࣮ߦ͞ΕΔ w ˗ਖ਼ৗύλʔϯͷϘλϯΛΫϦοΫ w ˗λεΫ͕Ωϡʔʹ௥Ճ͞ΕΔ w ˗ΫϦοΫ࣌ͷॲཧ͕࣮ߦ͞ΕΔ w ˗എܠ৭͕ը໘ʹ൓ө͞ΕΔ w ˒എܠ৭͕ը໘ʹ൓ө͞ΕΔ αϦЀϕϸЄϤ αϦЀϕϸЄϤ main thread worker thread ॏ͍ॲཧ࣮ߦத 㳌ቘΨ䋚ᤈ

˒ΫϦοΫ࣌ͷॲཧ͕࣮ߦ͞Ε8PSLFSʹλεΫ௥Ճ w ˒8PSLFSͰλεΫ͕࣮ߦ͞ΕΔ w ˗ਖ਼ৗύλʔϯͷϘλϯΛΫϦοΫ w ˗λεΫ͕Ωϡʔʹ௥Ճ͞ΕΔ w ˗ΫϦοΫ࣌ͷॲཧ͕࣮ߦ͞ΕΔ w ˗എܠ৭͕ը໘ʹ൓ө͞ΕΔ w ˒എܠ৭͕ը໘ʹ൓ө͞ΕΔ αϦЀϕϸЄϤ αϦЀϕϸЄϤ main thread worker thread ॏ͍ॲཧ࣮ߦத 㳌ቘ奾ຎ͢ኮᶎ΁ݍฉ

˒ΫϦοΫ࣌ͷॲཧ͕࣮ߦ͞Ε8PSLFSʹλεΫ௥Ճ w ˒8PSLFSͰλεΫ͕࣮ߦ͞ΕΔ w ˗ਖ਼ৗύλʔϯͷϘλϯΛΫϦοΫ w ˗λεΫ͕Ωϡʔʹ௥Ճ͞ΕΔ w ˗ΫϦοΫ࣌ͷॲཧ͕࣮ߦ͞ΕΔ w ˗എܠ৭͕ը໘ʹ൓ө͞ΕΔ w ˒എܠ৭͕ը໘ʹ൓ө͞ΕΔ αϦЀϕϸЄϤ αϦЀϕϸЄϤ main thread worker thread 㳌ቘ奾ຎΨmain thread΁᭗Ꭳ

˒ΫϦοΫ࣌ͷॲཧ͕࣮ߦ͞Ε8PSLFSʹλεΫ௥Ճ w ˒8PSLFSͰλεΫ͕࣮ߦ͞ΕΔ w ˗ਖ਼ৗύλʔϯͷϘλϯΛΫϦοΫ w ˗λεΫ͕Ωϡʔʹ௥Ճ͞ΕΔ w ˗ΫϦοΫ࣌ͷॲཧ͕࣮ߦ͞ΕΔ w ˗എܠ৭͕ը໘ʹ൓ө͞ΕΔ w ˒എܠ৭͕ը໘ʹ൓ө͞ΕΔ αϦЀϕϸЄϤ αϦЀϕϸЄϤ main thread worker thread 㳌ቘ奾ຎΨmain thread΁᭗Ꭳ όφμ咲ኞ

˒ΫϦοΫ࣌ͷॲཧ͕࣮ߦ͞Ε8PSLFSʹλεΫ௥Ճ w ˒8PSLFSͰλεΫ͕࣮ߦ͞ΕΔ w ˗ਖ਼ৗύλʔϯͷϘλϯΛΫϦοΫ w ˗λεΫ͕Ωϡʔʹ௥Ճ͞ΕΔ w ˗ΫϦοΫ࣌ͷॲཧ͕࣮ߦ͞ΕΔ w ˗എܠ৭͕ը໘ʹ൓ө͞ΕΔ w ˒എܠ৭͕ը໘ʹ൓ө͞ΕΔ αϦЀϕϸЄϤ αϦЀϕϸЄϤ main thread worker thread ᙧวᜋΨኮᶎ΁ݍฉ

σϞ w ϒϥ΢β্ͰػցֶशΛಈ͔ͯ͠ΈΔ w શͯϝΠϯεϨουͰ࣮ߦ͢ΔύλʔϯͱP⒎UIFNBJOUISFBEͷ ύλʔϯΛൺֱ͢Δ w Ϛγϯͷੑೳ͕଱͑ΒΕ͕ͣࠩ෼͔Βͳ͔ͬͨɾɾɾ  ಛʹεϚϗͩͱͲͪΒͷύλʔϯ΋ݻͬͯ͠·͏ɾɾɾ

·ͱΊ

·ͱΊ w ϒϥ΢β্ͷॲཧ͸γϯάϧεϨουͰ࣮ߦ͞ΕΔͷͰॏ͍ॲཧ Λߦ͏ͱϢʔβͷૢ࡞͕ϒϩοΫ͞Εͯ͠·͏ w 8PSLFSΛ׆༻͢Δ͜ͱͰϒϩοΩϯάΛղফ͢Δ͜ͱ͕Ͱ͖Δ w ϝΠϯεϨου͕%0.ૢ࡞ʹઐ೦Ͱ͖ΔΑ͏ʹॏ͍ॲཧ͸ଞͷ εϨουͰߦ͏ͱ͍͏ߟ͑ํ͕P⒎UIFNBJOUISFBE

P⒎UIFNBJOUISFBEͷ׆༻ํ๏ w ॲཧ݁Ռͷ൓өʹϦΞϧλΠϜੑ͕ٻΊΒΕΔΑ͏ͳ৔໘ w αʔόͱ௨৴ͯ͠Δͱ଎౓ཁ݅Λຬͨͤͳ͍ w αʔόʹૹΔ͜ͱ͕ϦεΫͱͳΔΑ͏ͳ৔໘ w ΧϝϥͰࡱӨͨ͠ը૾ͷՃ޻ͳͲ w
࠷ۙ͸ϒϥ΢β্Ͱ"*΍"3Λಈ͔͢औΓ૊Έ΋ଟ͍

͋Γ͕ͱ͏͍͟͝·ͨ͠

20181107_off_the_main_thread.pdf

20181107_off_the_main_thread.pdf

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