PHP(>=5.5.0)でジェネレータを使ってメモリ節約生活

1)1 ͰδΣωϨʔλΛ ࢖ͬͯϝϞϦઅ໿ੜ׆ 1)1#-5 !UBOJTIJLJOH

5XJUUFS!UBOJTIJLJOH ͜Μ͹Μ͸ (JU)VCIUUQTHJUIVCDPNUBOJTIJLJOH CMPHIUUQUBOJTIJLJOHIBUFOBCMPHDPN ژ౎͔Β͖·ͨ͠ ීஈ͸1ZUIPOͱ͔Α͘ॻ͍ͯΔ

͍ͩͿݹ͍࿩୊Ͱ͕͢ δΣωϨʔλͷ࿩͠·͢

JOJ@HFU bNFNPSZ@MJNJU` l.z GPSFBDI SBOHF BTJ \
FDIPJ ^

'BUBMFSSPS"MMPXFE NFNPSZTJ[FPGYYY CZUFTFYIBVTUFE

഑ྻΛϝϞϦʹల։ͨ͘͠ͳ͍

ΠςϨʔλΛ࢖͑͹ྑͦ͞͏ GPSFBDIͷΑ͏ͳ൓෮ॲཧʹ͓͚ΔڍಈΛந৅Խ͢Δػߏ IUUQTTFDVSFQIQOFUNBOVBMKB MBOHVBHFPPQJUFSBUJPOTQIQ

ΠςϨʔλΛ࢖͑͹ྑͦ͞͏ GPSFBDIͷΑ͏ͳ൓෮ॲཧʹ͓͚ΔڍಈΛந৅Խ͢Δػߏ IUUQTTFDVSFQIQOFUNBOVBMKB MBOHVBHFPPQJUFSBUJPOTQIQ औΓ׶͑ͣSBOHFؔ਺Λ࣮૷ͯ͠ΈΔʂ

QIQ DMBTT3BOHF*UFSBUPSJNQMFNFOUT*UFSBUPS \ QSPUFDUFEDPVOU WBMVF TUBSU FOE GVODUJPO@@DPOTUSVDU TUBSU
FOE \ UIJTTUBSUTUBSU UIJTFOEFOE ^ GVODUJPOSFXJOE \ UIJTWBMVFUIJTTUBSU UIJTDPVOU ^ GVODUJPODVSSFOU \ SFUVSOUIJTWBMVF ^ GVODUJPOWBMJE \ SFUVSO UIJTWBMVFUIJTTUBSU UIJTWBMVFUIJTFOE ^ GVODUJPOOFYU \ UIJTWBMVF UIJTDPVOU ^ GVODUJPOLFZ \ SFUVSOUIJTDPVOU ^ ^

QIQ DMBTT3BOHF*UFSBUPSJNQMFNFOUT*UFSBUPS \ QSPUFDUFEDPVOU WBMVF TUBSU FOE GVODUJPO@@DPOTUSVDU TUBSU
FOE \ UIJTTUBSUTUBSU UIJTFOEFOE ^ GVODUJPOSFXJOE \ UIJTWBMVFUIJTTUBSU UIJTDPVOU ^ GVODUJPODVSSFOU \ SFUVSOUIJTWBMVF ^ GVODUJPOWBMJE \ SFUVSO UIJTWBMVFUIJTTUBSU UIJTWBMVFUIJTFOE ^ GVODUJPOOFYU \ UIJTWBMVF UIJTDPVOU ^ GVODUJPOLFZ \ SFUVSOUIJTDPVOU ^ ^ ॳظԽॲཧ ݱࡏͷ஋Λฦ͢ ϧʔϓͷܧଓ৚݅ ཁૉΛ࣍ͷཁૉ΁ ݱࡏͷཁૉͷΩʔΛฦ͢

FDIPNFNPSZ@HFU@VTBHF JUFNTOFX3BOHF*UFSBUPS GPSFBDI JUFNTBTJ \
FDIPNFNPSZ@HFU@VTBHF ^ ʜʜ ճͷϧʔϓͰ΋ ԯճͷϧʔϓͰ΋ .# ͔͠ϝϞϦΛ࢖Θͳ͍ʂ

ΊͰͨ͠ΊͰͨ͠

*UFSBUPSΠϯλʔϑΣʔεΛࣗ෼Ͱ࣮૷͢Δͷ͸໘౗ʂ ͭ΋࣮૷ͨ͘͠ͳ͍

δΣωϨʔλͰ΋ಉ༷ͷ͜ͱ͕Ͱ͖Δ 1)1Ͱ௥Ճ͞ΕͨZJFMEจ GVODUJPONZHFOFSBUPS \ ZJFME ZJFME ZJFME ZJFME ^ ճ໨
ZJFMEͨ࣌͠఺ͷঢ়ଶΛอଘͯ͠ ࣍ͷݺͼग़࣌͠ʹ͔ͦ͜Β࠶։ ճ໨ ճ໨

δΣωϨʔλͰ΋ಉ༷ͷ͜ͱ͕Ͱ͖Δ (FOFSBUPSΫϥε͸*UFSBUPSΠϯλʔϑΣʔεΛ࣮૷ GPSFBDIϧʔϓͰ͸$Ͱ࣮૷͞Εͨؔ਺͕ݺ͹ΕΔͨΊ ࣗ෼Ͱ*UFSBUPSΛ૊Μͩ৔߹ 1)1ϝιου͕࢖༻ ΑΓૣ͍ ZJFMEจΛؚΜͩؔ਺δΣωϨʔλؔ਺ δΣωϨʔλؔ਺ʹؔ࿈ͨ͠(FOFSBUPSΫϥεΛฦ͢

GVODUJPOYSBOHF TUBSU FOE \ GPS JTUBSUJFOE J \ ZJFMEJ ^
^ δΣωϨʔλؔ਺

^ δΣωϨʔλؔ਺ GPSFBDI YSBOHF \ FDIPJ ^

^ δΣωϨʔλؔ਺ GPSFBDI YSBOHF \ FDIPJ ^ ͓खܰͰ࠷ߴ

ࡶʹNJDSPUJNF ͰϕϯνϚʔΫͨ݁͠Ռ (FOFSBUPS *UFSBUPS ϧʔϓճ਺ GPSMPPQ
NFNPSZ@MJNJU. dϧʔϓճ਺Λ଍͠߹ΘͤΔॲཧ 049 2.2 GHz Intel Core i7 8 GB 1600 MHz DDR3 ୯Ґ͸ඵ T

·ͱΊ (FOFSBUPS͸ ϝϞϦʹల։্ͨ͠ͰͷMPPQ΄Ͳ͸ૣ͘ͳ͍͚Ͳ ϝϞϦফඅΛ཈͑ΒΕΔͦ͠ΕͳΓʹεϐʔυ΋ग़Δ͠ ࣮૷΋؆୯ Մಡੑ΋ߴ͍ ศརʂʂʂʂʂʂ

PHP(>=5.5.0)でジェネレータを使ってメモリ節約生活

PHP(>=5.5.0)でジェネレータを使ってメモリ節約生活

Rikito Taniguchi

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1)1 ͰδΣωϨʔλΛ ࢖ͬͯϝϞϦઅ໿ੜ׆ 1)1#-5 !UBOJTIJLJOH

5XJUUFS!UBOJTIJLJOH ͜Μ͹Μ͸ (JU)VCIUUQTHJUIVCDPNUBOJTIJLJOH CMPHIUUQUBOJTIJLJOHIBUFOBCMPHDPN ژ౎͔Β͖·ͨ͠ ීஈ͸1ZUIPOͱ͔Α͘ॻ͍ͯΔ

͍ͩͿݹ͍࿩୊Ͱ͕͢ δΣωϨʔλͷ࿩͠·͢

JOJ@HFU bNFNPSZ@MJNJU` l.z GPSFBDI SBOHF BTJ \

'BUBMFSSPS"MMPXFE NFNPSZTJ[FPGYYY CZUFTFYIBVTUFE

഑ྻΛϝϞϦʹల։ͨ͘͠ͳ͍

ΠςϨʔλΛ࢖͑͹ྑͦ͞͏ GPSFBDIͷΑ͏ͳ൓෮ॲཧʹ͓͚ΔڍಈΛந৅Խ͢Δػߏ IUUQTTFDVSFQIQOFUNBOVBMKB MBOHVBHFPPQJUFSBUJPOTQIQ

ΠςϨʔλΛ࢖͑͹ྑͦ͞͏ GPSFBDIͷΑ͏ͳ൓෮ॲཧʹ͓͚ΔڍಈΛந৅Խ͢Δػߏ IUUQTTFDVSFQIQOFUNBOVBMKB MBOHVBHFPPQJUFSBUJPOTQIQ औΓ׶͑ͣSBOHFؔ਺Λ࣮૷ͯ͠ΈΔʂ

QIQ DMBTT3BOHFUFSBUPSJNQMFNFOUTUFSBUPS \ QSPUFDUFEDPVOU WBMVF TUBSU FOE GVODUJPO@@DPOTUSVDU TUBSU

QIQ DMBTT3BOHFUFSBUPSJNQMFNFOUTUFSBUPS \ QSPUFDUFEDPVOU WBMVF TUBSU FOE GVODUJPO@@DPOTUSVDU TUBSU

FDIPNFNPSZ@HFU@VTBHF JUFNTOFX3BOHF*UFSBUPS GPSFBDI JUFNTBTJ \

ΊͰͨ͠ΊͰͨ͠

*UFSBUPSΠϯλʔϑΣʔεΛࣗ෼Ͱ࣮૷͢Δͷ͸໘౗ʂ ͭ΋࣮૷ͨ͘͠ͳ͍

δΣωϨʔλͰ΋ಉ༷ͷ͜ͱ͕Ͱ͖Δ 1)1Ͱ௥Ճ͞ΕͨZJFMEจ GVODUJPONZHFOFSBUPS \ ZJFME ZJFME ZJFME ZJFME ^ ճ໨

δΣωϨʔλͰ΋ಉ༷ͷ͜ͱ͕Ͱ͖Δ (FOFSBUPSΫϥε͸UFSBUPSΠϯλʔϑΣʔεΛ࣮૷ GPSFBDIϧʔϓͰ͸$Ͱ࣮૷͞Εͨؔ਺͕ݺ͹ΕΔͨΊ ࣗ෼ͰUFSBUPSΛ૊Μͩ৔߹ 1)1ϝιου͕࢖༻ ΑΓૣ͍ ZJFMEจΛؚΜͩؔ਺δΣωϨʔλؔ਺ δΣωϨʔλؔ਺ʹؔ࿈ͨ͠(FOFSBUPSΫϥεΛฦ͢

GVODUJPOYSBOHF TUBSU FOE \ GPS JTUBSUJFOE J \ ZJFMEJ ^

GVODUJPOYSBOHF TUBSU FOE \ GPS JTUBSUJFOE J \ ZJFMEJ ^

GVODUJPOYSBOHF TUBSU FOE \ GPS JTUBSUJFOE J \ ZJFMEJ ^

ࡶʹNJDSPUJNF ͰϕϯνϚʔΫͨ݁͠Ռ (FOFSBUPS *UFSBUPS ϧʔϓճ਺ GPSMPPQ

·ͱΊ (FOFSBUPS͸ ϝϞϦʹల։্ͨ͠ͰͷMPPQ΄Ͳ͸ૣ͘ͳ͍͚Ͳ ϝϞϦফඅΛ཈͑ΒΕΔͦ͠ΕͳΓʹεϐʔυ΋ग़Δ͠ ࣮૷΋؆୯ Մಡੑ΋ߴ͍ ศརʂʂʂʂʂʂ

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