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PHPのARM向け最適化の中身を見てみた
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hnw
March 25, 2023
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PHPのARM向け最適化の中身を見てみた
PHPerKaigi 2023 (2023/03/25) 発表資料
hnw
March 25, 2023
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Transcript
Exploring ARM64 optimization in PHP 7.4+ 1)1ͷ"3.͚࠷దԽͷ தΛݟͯΈͨ 1)1FS,BJHJ
ൃදࢿྉ !IOX
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1)1ຊମͷόάΛ݅ใࠂ
Έͳ͞Μ "3.Πϯελϯεͬͯ·͢ʁ
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ࠓ͙͢"3.Λ࠾༻͖͔͢ʁ ❖ ຊʹ҆͘ͳΔ͔ཁݕ౼ ❖ ΞϓϦέʔγϣϯʹΑͬͯ"3.ͷํ͕͍͜ͱ͋Δ ❖ ֤छ044ͷ࠷దԽ*OUFMܥͷํ͕ਐΜͰ͍Δ ❖ "3.͚࠷దԽͷਐߦͱ$16։ൃͷਐߦͰঢ়گվળ͍ͯͣ͘͠ ❖
1)1ʹ͍ͭͯ"84ࣾһ͕"3.Ή͚࠷దԽΛຊମʹDPOUSJCVUF ❖ 1)1ʢϦϦʔεʣҎ߱Ͱར༻Ͱ͖Δ
"3.্ͷ1)1͍ͷ͔ʁ ❖ ͔֬ʹ1)1͔Β"3.͚ͩ͘ͳͬͯΔʢ.H͕(SBWJUPOʣ VQ VQ
ϕϯνϚʔΫςετ͕͍͚ͩͰʁ ❖ ࣮ΞϓϦͰ1)1͔Β"3.͚ͩ͘ͳͬͯΔ VQ
❖ Ճݮࢉԋࢉࢠɺ࿈ྻͷ෦ॲཧɺؔݸΛੑೳվળ 1)1ͷ"3.Ή͚࠷దԽͷத Function Speedup ࠷దԽͷத inc/dec 1.5x Φʔόʔϑϩʔݕग़ߴԽ add/sub
1.82x Φʔόʔϑϩʔݕग़ߴԽ hash_init 1.61x /&0/໋ྩར༻ hash_func 1.72x ໋ྩϨϕϧฒྻੑվળ crc32 29x "3.໋ྩར༻ strrev 7.8x /&0/໋ྩར༻ base64 encode 3.5x /&0/໋ྩར༻ base64 decode 2.15x /&0/໋ྩར༻ addslashes 2.8x /&0/໋ྩར༻ stripslashes 4.9x /&0/໋ྩར༻
࠷దԽͷओ/&0/໋ྩ ❖ /&0/໋ྩʹ"3.ͷ4*.% 4JOHMF*OTUSVDUJPO.VMUJQMF%BUB ໋ྩ ❖ 4*.%ʹ໋ྩͰෳͷσʔλʹରͯ͠ಉ͡ॲཧ͕Ͱ͖Δ ❖ ߴͳΜ͚ͩͲ͍ʹ͍͘Ϛγϯޠͷ໋ྩ܈ ❖
ը૾ॲཧͷߴԽͳͲ͕యܕతͳϢʔεέʔε
/&0/໋ྩͷయܕతͳར༻ྫ ❖ ࿈ଓϝϞϦྖҬʹ͋ΔϐΫηϧσʔλʢ3(#CJUʣΛ৭͝ͱʹॲཧ͢Δ
CBTF@FODPEFͷߴԽͷ༰ ❖ "3.͚࠷దԽͷதͰ໘ന͔ͬͨͷΛݸհ͠·͢ ❖ ߴԽରɿCBTF@FODPEF ❖ CJUͷόΠφϦΛCJUͷ"4$**ʹม͢Δॲཧ ❖ ߴԽͷख๏ɿ/&0/໋ྩΛͬͯόΠτΛҰׅม
❖ ഒͷߴԽ
CBTF@FODPEFͷߴԽͷ༰ ❖ WFDUPS WFDUPSʹಛԽͨ͠MPBETUPSF໋ྩΛ༗ޮ׆༻͍ͯ͠Δ
·ͱΊ ❖ "841)1ʹ"3.͚࠷దԽΛೖΕͨɺ1)1͔Βར༻Մೳ ❖ ࣗࣾͷϏδωεΛޙԡ͢͠Δ044DPOUSJCVUFɺ໘ന͍Ͱ͢Ͷ ❖ "3.͚ͷ࠷దԽ/&0/໋ྩΛར༻͢Δͷ͕ଟ͔ͬͨ ❖ ߴԽͰ͖Δؔɾॲཧଞʹ͋Γͦ͏ ❖
Έͳ͞Μ͍͖ͬͯ·͠ΐ͏ ❖ ݸਓతʹ3BTQCFSSZ1JʢCJU"3.ʣ͚ʹରԠ͍ͨ͠