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ࣗ࡞HTTPϧʔλʔ͔Β ৽͍͠ServeMux @bmf_san Go Conference 2024 2024.6.8
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Who am Iʁ • Kenta Takeuchi • @bmf_san • bmf-san • https://bmf-tech.com/
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ࣗ࡞HTTPϧʔλʔ IUUQTHJUIVCDPNCNGTBOHPCMJO
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͢͜ͱ • Go1.22ͰՃ͞ΕͨServeMuxͷػೳ • ServeMuxͱαʔυύʔςΟͷൺֱ • ServeMuxͷੑೳ • GoͷHTTPϧʔλʔબఆʹ͍ͭͯࢲݟ
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ServeMuxͱʁ • net/http͕͍࣋ͬͯΔϚϧνϓϨΫα • ύεύλʔϯͱϦΫΤετΛϚονϯά͢Δϩ δοΫΛ࣋ͪɺϋϯυϥΛݺͼग़͢ • ServeMuxߏମ • cf. https://cs.opensource.google/go/go/+/refs/ tags/go1.22.2:src/net/http/server.go;l=2432
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Go1.22ͰՃ͞ΕͨServeMuxͷػೳ • HTTPϝιουʹΑΔϧʔςΟϯάͷఆ͕ٛ Մೳʹͳͬͨ
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Go1.22ͰՃ͞ΕͨServeMuxͷػೳ • ϫΠϧυΧʔυʹΑΔϧʔςΟϯάͷఆٛ ͕Մೳʹͳͬͨ
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Go1.22ͰՃ͞ΕͨServeMuxͷػೳ • ϫΠϧυΧʔυʹϚονͨ͠ɺ http.RequestͷPathValueϝιουͰऔಘՄ ೳ
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Go1.22ͰՃ͞ΕͨServeMuxͷػೳ • શҰகͱ͍ͨ͠߹{$}Λ͏
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ServeMuxͱαʔυύʔςΟͷൺֱ • ServeMuxͱαʔυύʔςΟͷੑೳൺֱΛ࣮ࢪ • https://github.com/bmf-san/go-router-benchmark • ύεύλʔϯͷϚονϯάͷΈͰɺύεύλʔ ϯͷొʢϧʔςΟϯάͷఆٛʣܭଌର֎ • gin-gonic/gin, go-chi/chi, gorilla/mux, labstack/ echoͳͲ
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ServeMuxͱαʔυύʔςΟͷൺֱ • ServeMuxฏۉҎ্ͷύϑΥʔϚϯεΛ ͍࣋ͬͯΔ • ϫΠϧυΧʔυͷʢ/foo/{bar}/{baz}/ {baz}/…ʣ͕૿͑ΔͱੑೳྼԽ͕ݦஶ • ࣮ࡍͷϢʔεέʔεͱͯ͠ϨΞέʔε ͳͷͰؾʹ͢Δ͜ͱͰͳͦ͞͏
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ServeMuxͷੑೳ • ੑೳͷྑ͍HTTPϧʔλʔϝϞϦޮͷྑ͍ߏ ʢex. Radix TreeʣΛ࠾༻͍ͯ͠Δ • ServeMuxͰɺ࣮͕ෳࡶԽ͍͢͠σʔλߏ ࠾༻͞Ε͍ͯͳ͍ • →༨ఔ࠷ѱͳσʔλߏΛ࠾༻͠ͳ͍ݶΓɺ HTTPϧʔλʔ͕ϨΠςϯγCPU༻ʹେ͖ ͳӨڹΛٴ΅͞ͳ͍ʢͨͿΜʣ
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GoͷHTTPϧʔλʔબఆʹ͍ͭͯࢲݟ
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͏ͪΐͬͱਅ໘ͳͭ
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GoͷHTTPϧʔλʔબఆʹ͍ͭͯࢲݟ • HTTPϧʔλʔͷҠߦΛݕ౼͢ΔͳΒɾɾ • ͍ͬͯΔHTTPϧʔλʔͷnet/httpͱͷޓੑ ʁ • ServeMuxʹͳ͍ػೳੑೳ͕ඞཁ͔ʁ • ϧʔςΟϯάͷ༏ઌॱҐʹಠࣗͷϩδοΫ͕͋ Δ͔ʁ
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·ͱΊ • ϫΠϧυΧʔυΛͬͨϧʔςΟϯά͕Ͱ͖ΔΑ͏ʹ ͳͬͨ • αʔυύʔςΟͱൺֱͯ͠ѱ͘ͳ͍ੑೳ • σʔλߏͱΞϧΰϦζϜͷબอकੑͱੑೳͷό ϥϯε͕େࣄͦ͏ • ৽نʹબఆ͢ΔͳΒServeMuxɺطଘΓ͑৭ʑݕ ౼͢Δͷ͕ྑͦ͞͏
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ࣗ࡞HTTPϧʔλʔ͔Β৽͍͠ServeMux • ࠓޙࣗ࡞HTTPϧʔλʔʢ≠αʔυύʔ ςΟʣͰͳ͘ServeMuxΛ͍͍ͨͱࢥͬ ͍ͯ·͢ • αʔυύʔςΟέʔεόΠέʔε
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5IBOLZPVGPSZPVSXBUDIJOHʂ
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Appendix • ࣗ࡞HTTPϧʔλʔ͔Β৽͍͠ServeMux • https://bmf-tech.com/posts/ %e8%87%aa%e4%bd%9cHTTP%e3%83%ab%e3%8 3%bc%e3%82%bf%e3%83%bc%e3%81%8b%e3%82 %89%e6%96%b0%e3%81%97%e3%81%84ServeMu x%e3%81%b8#14- HTTP%E3%83%AB%E3%83%BC%E3%82%BF%E3 %83%BC%E3%81%AE%E3%83%91%E3%83%95% E3%82%A9%E3%83%BC%E3%83%9E%E3%83%B3 %E3%82%B9%E3%81%AB%E3%81%A4%E3%81% 84%E3%81%A6