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Swift 並行性(Concurrency)を読み解く - WWDC21
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notoroid
August 04, 2021
Programming
2
230
Swift 並行性(Concurrency)を読み解く - WWDC21
Swift Concurrency関連プレゼンテーションガイド
notoroid
August 04, 2021
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Transcript
4XJGUฒߦੑ $PODVSSFODZ ΛಡΈղ͘ 88%$ 4XJGU$PODVSSFODZؔ࿈ϓϨθϯΨΠυ
ࢀߟࢿྉ"QQMF%FWFMPQFS IUUQTBQQTBQQMFDPNKQBQQBQQMFEFWFMPQFSJE 88%$༰ॱ࣍ຊޠରԠ͞Ε͍ͯ͘
88%$͔Βϲ݄ɻ 4XJGUݴޠͷۄͷBXBJUBTZOD BDUPS͕ൃද͞Ε·ͨ͠
͕ɺϲ݄ܦͬͯ৽ ༷ʹશ͘׳Εͳ͍ʂ
88%$ͷؔ࿈͢ΔϓϨθϯ ࢿྉΛͱ͓ͨ͠ͷͰհɻ
88%$ͰԿ͕͓͖ͨͷ͔ 4XJGU ͍ͭʹBTZODBXBJU͕ಋೖ͞Ε·ͨ͠ɻBTZODBXBJU ͚ͩͰͳ͘ɺBDUPS!.BJO"DUPS͕ಋೖɻ
88%$ͰԿ͕͓͖ͨͷ͔ 4XJGU ͍ͭʹBTZODBXBJU͕ಋೖ͞Ε·ͨ͠ɻBTZODBXBJU ͚ͩͰͳ͘ɺBDUPS!.BJO"DUPS͕ಋೖɻ BTZODBXBJUʹ͍ͭͯ88%$ҎલΑΓݴޠ༷ ͱͯ͠ఏҊ͞Ε͓ͯΓɺ৽ٕज़ʹΊ͟ͱ͍ෳͷ։ൃ ऀ༷ΑΓهࣄ͕ެ։͞Ε͍ͯΔɻ
1SPQPTBMʹࡌ ͍ͬͯͳ͍4XJGU ͷBTZODBXBJU ͕ૉΒ͍͠ͱࢥ ͏ཧతഎܠ IUUQTRJJUBDPN LPIFSJUFNT CFBFD
ಡΈͱͯ͠໘ന͍ɺ ໘ന͍͕ผʹٕज़ͰΩϟοΩϟͨ͠ ͍Θ͚Ͱͳ͍ͱ͍͏ͷ͕ຊԻɻ
&$."4DSJQUͰઌΜͯ͡ಋೖ͞Εͯ ͍ͨػೳ͕4XJGUʹ͖ͬͯͨ͋Γ͕ ͕ͨΔؾແ͔ͬͨΓ͢Δɻ
৽͍͠ݴޠ༷͕ಋೖ͢Δ ඞཁ͕͋Δ ඞવੑ ʹೲಘ͠ɺ ଉΛు༷͘ʹࣗવʹར༻Ͱ͖Δ͜ͱ͕ཧͰ
ͱ͍͏ཧ೦ͷͱɺBTZODBXBJUBDUPSपΓ͕ಋ ೖ͞Εͨࡍͷ4XJGUݴޠʹ͓͚ΔฒߦੑΛѻ͏্Ͱ ͷϨΪϡϨʔγϣϯมߋʹ͍ͭͯղܾʹઆ໌͢Δɻ
88%$ͷ 4XJGUʹ͓͚Δฒߦੑ ֓ཁ
BTZODBXBJU w "TZODඇಉظΛࣔ͢म০ࢠͰ w BTZOD͕༩͞ΕΔͱBXBJUΛͬͯॲཧऴྃ·Ͱडঢ়ଶʹ͢ Δ͜ͱΛӅṭͰ͖Δ w NBD04J1IPOFͰͷϚϧνεϨου্ͷॲཧ͕࣮ࡍͲ͏ͳͬͯ ͍Δ͔4XJGUίʔυهड़ऀଆ͔ΒӅṭ͞Ε͍ͯΔ
BDUPS w ෳͷεϨου͔Βݺͼग़͞ΕΔΛอޢ͢ΔΈΛDMBTTϥ ΠΫͳఆٛͰهड़Ͱ͖Δ w ϓϩύςΟෳ͔ΒͷมߋͷࡍʹBXBJUͰडՄೳ w ϝιουΛఆٛ͢Δͱͦͷϝιου͕ݺͼऴΘΔ·Ͱ֎෦͔Βม ߋ͕ՃΘΒͳ͍ w
ͷڝ߹Λ͚͞ΔͨΊ෦తʹ4JHOBMɺ4FNBQIPSFͳͲΞΫ ηε੍ޚػೳΛ͍ͬͯΔ͕4XJGUίʔυهड़ऀଆ͔ΒӅṭ͞ Ε͍ͯΔɻ
ߏԽ͞Εͨಉظॲཧ w "TZODBXBJUΛ֊తʹݺͼग़͠ͱݺͼग़͠֊Λߟྀͨ͠ಉظ ॲཧΛ࣮ݱͰ͖Δ w 4XJGUΑΓલಠཱͨ͠ಉظॲཧΛ·ͱΊΔͳͲ࣮ͯ͠ݱͰ ͖ͨ͜ͱ͕4XJGU͔ΒσϑΥϧτͷಉظॲཧѻ͍ͱͳͬͨ w ͜Ε·ͰͷಉظॲཧΦϓγϣϯѻ͍ͱͳΓಠཱͨ͠ಉظॲཧͱ ໋໊
w ಠཱͨ͠ಉظॲཧΦϓγϣϯѻ͍ʹͳͬͨɺBTZODBXBJU ΑΓ໌ࣔతʹݺͼग़͠ඞཁ
!.BJO"DUPS w "DUPSෳΞΫηε͕͋ͬͨ߹ͷΛอޢ͢ΔΈΛఏڙ ͢Δ͚͕ͩͩͬͨ w !.BJO"DUPSडޙʹඞͣϝΠϯεϨου͔Βݺͼग़͞ΕΔอ ূ͢ΔͨΊͷΈ w 4XJGU"UUSJCVUFTͳͷͰ4XJGUͷ༷͔Βएׯ֎ΕΔ w
4%,ͰϝΠϯεϨουPSϝΠϯεϨουҎ֎ݺͼग़͔͠໌ࣔͰ ͖͍ͯͳ͔ͬͨͷ ؔɺΫϥεͷϓϩύςΟͳͲ ͕໌ࣔతʹ ͳͬͨ
తʹ͍͏ͱʜ w ৽͍͠ϘΩϟϒϥϦʔͱͯ͠BTZODBXBJUΛಋೖ͢Δ͜ͱͰॲཧ ͪͷهड़Λ͘هड़Ͱ͖ΔΑ͏ʹͳͬͨɻͨͩ͠ඇಉظʹͨ͠ࡍʹى ͖Δτϥϒϧίʔυهड़ऀଆͷͰ͋Δ͜ͱมԽແ͠ w ฒྻಉظͷฒྻੑͱߏԽ͞ΕͨฒྻॲཧʹΑΓฒྻॲཧʹίʔυత ͳॊೈੑ͕ੜ·Ε͍ͯΔɻͦΕΛ࣮ݱ͢ΔͨΊ࣮ݱ͢ΔͨΊBTZOD BXBJUͰεϨουΛίʔυهड़ऀ͔ΒӅṭ͍ͯ͠ΔΑ͏ͳͷ w
6*ύʔπͳͲϝΠϯεϨουݺͼग़͠Λอূ͢ΔͨΊͷهड़ͱͯ͠ !.BJO"DUPS͕Ճ͞Εͨɻίʔυهड़ऀݺͼग़͠ݩͷεϨουʹ ҙΛ͚Δඞཁ͕͕͋ͬͨݴޠϨϕϧͰ҆શͳݺͼग़͕͠อূ͞Ε ͨ
ϓϨθϯςʔγϣϯհ
w .FFUBTZODBXBJUJO4XJGU w .FFU"TZOD4FRVFODF w &YQMPSFTUSVDUVSFE DPODVSSFODZJO4XJGU w 1SPUFDUNVUBCMFTUBUFXJUI 4XJGUBDUPST
w %JTDPWFSDPODVSSFODZJO 4XJGU6* ϓϨθϯςʔγϣϯհ
.FFUBTZODBXBJUJO 4XJGU IUUQTEFWFMPQFSBQQMFDPNWJEFPT QMBZXXED w BTZODΛ͏ؔͷఆٛํ ๏ͱɺBXBJUͷ͍ํʹͭ ͍ͯͷϓϨθϯςʔγϣ ϯɻ
.FFU"TZOD4FRVFODF IUUQTEFWFMPQFSBQQMFDPNWJEFPT QMBZXXED w BTZOD͕Ճ͞Εͨݺͼग़ ͠ΛྻԽ͢ΔͱBXBJU͠ ͨࡍʹฒߦͯ͠ݺͼग़͞ ΕΔ͜ͱʹ͍ͭͯͷϓϨθ ϯςʔγϣϯɻ
&YQMPSFTUSVDUVSFE DPODVSSFODZJO4XJGU IUUQTEFWFMPQFSBQQMFDPNWJEFPT QMBZXXED w "TZOD͕Ճ͞Εͨݺͼग़͠ ෦ͰBXBJUΛ͏͜ͱ͕Ͱ ͖ΔΛઆ໌ͨ͠ϓϨθϯς ʔγϣϯɻ w
Τϥʔ͕͋ͬͨ߹ʹFSSPS ΛUISPXͨ͠߹ͷڍಈʹͭ ͍ͯͷݴٴ͋Γɻ w ಠཱͨ͠ඇಉظॲཧʹ͍ͭͯ ຊϓϨθϯςʔγϣϯͰઆ ໌͍ͯ͠Δɻ
1SPUFDUNVUBCMFTUBUF XJUI4XJGUBDUPST IUUQTEFWFMPQFSBQQMFDPNWJEFPT QMBZXXED w BDUPSͱ!.BJO"DUPSͷઆ ໌ w ༰తʹ!.BJO"DUPSΛ આ໌͢ΔͨΊͷBDUPSΛઆ
໌͢Δͱ͍ͬͨ
%JTDPWFSDPODVSSFODZJO 4XJGU6* IUUQTEFWFMPQFSBQQMFDPNWJEFPT QMBZXXED w BTZODBXBJUBDUPS͕6* पΓͷίʔσΟϯάελΠ ϧΛม͑Δ͜ͱ͔͕֬ͩ Ұ൪ԸܙΛड͚͍ͯΔͷ 4XJGU6*ͰΔ͜ͱΛࣔ͢ϓ
Ϩθϯςʔγϣϯɻ
ࡶ؍
ίϯγϡʔϚʔιϑτΣΞʹಉظॲཧ͕ಋೖ͞Ε࢛ͯੈلᶃ w 8JOEPXTͷ͜ΖϚʔέςΟϯάతʹػೳ͕Ճ͞Ε։ൃऀ ͷαϙʔτͳ͔ͬͨ w ˡ$$ ݴޠͷڥ͕ϚϧνεϨουΛߟྀ͠ͳ͍ظ͕ؒଓ͍ ͨ w ฒߦੑʹΑΔੑೳʹ͍ͭͯ+BWB7.͕αʔόʔαΠυͰূ໌͠
͍ͯͨ w ˡධՁ͞Εͨͷ+BWB4DSJQUͷϚϧνεϨουੑೳͩͬͨ w +BWB7.ݴޠͱͯ͠4DBMB͕ొ
ίϯγϡʔϚʔιϑτΣΞʹಉظॲཧ͕ಋೖ͞Ε࢛ͯੈلᶄ w ΞϓϦͰ"QQMF͕Ͱ$FOUSBM%JTQBUDI2VFVFͰCMPDLߏจͱɺ มͷΩϟϓνϟΛಋೖ w ˡίϯύΠϥʹϝεΛೖΕΔܾஅ͔Β৽ݴޠ4XJGU͕ੜ w ฒߦੑʹ͍ͭͯͷ͕ٞ׆ൃʹͳͬͨͷ/PEF+4 αʔόʔαΠ υ+BWB4DSJQU
ͷBTZODBXBJU w ˡฒߦੑΛهड़ํ๏ʹܾண͢ΔϚϧνεϨουΛѻ͏ݴޠͰͷ ಋೖݕ౼தͩͬͨ
ݸਓత4XJGUฒߦੑݟղ
4XJGUݴޠͷ$PODVSSFODZͰલʹෆ ʹίϯγϡʔϚʔιϑτʹಋೖ͞Εͨಉ ظॲཧͷه๏ʹҰఆͷܾண͕͍ͭͨͷͰ