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GolangͰࢧ͑Δ ϋΠύϑΥʔϚϯεAPI Kazuhisa Togo

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× LIGʹ͓͚ΔGolang΁ͷऔΓ૊Έ “Gopher” illustration by © Renee French

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× ࣗࣾαʔϏεͷόοΫΤϯυʹ GolangΛ࠾༻͍ͯ͠·͢ “Gopher” illustration by © Renee French

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× ϚΠΫϩαʔϏεͷڮ౉͠Λ୲͏౷߹API “Gopher” illustration by © Renee French

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× ๲େͳϦΫΤετΛࡹ͘େن໛API “Gopher” illustration by © Renee French ։ൃதͷAPI

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× 100% GolangͰ։ൃ͞Ε͍ͯ·͢ “Gopher” illustration by © Renee French ։ൃதͷAPI

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ͳͥGolangͳͷ͔

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LIGͷ౷ҰΞΧ΢ϯταʔϏε

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OAuth 2 αʔόʔ + API

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͋ΒΏΔαʔϏεͷϩάΠϯॲཧΛ୲౰

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LIG ID͕μ΢ϯ ʹ શαʔϏεͰϩάΠϯෆՄʹ

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ೝূॲཧ ʹ ηΩϡϦςΟʔϗʔϧ͸ڐ͞Εͳ͍

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ϛογϣϯΫϦςΟΧϧ

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๲େͳಉ࣌ϦΫΤετ ։ൃதͷAPI

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ߴෛՙʹ଱͑ΔύϑΥʔϚϯε͕ඞཁ ։ൃதͷAPI

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ӡ༻ίετ΋ݮΒ͍ͨ͠ ։ൃதͷAPI

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୯Ґੑೳͷ޲্ =
 αʔόʔͷ୆਺࡟ݮ ։ൃதͷAPI

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αʔϏεͷఀࢭ͸ େن໛ͳػձଛࣦʹܨ͕Δ ։ൃதͷAPI

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৴པੑ͕ඞཁෆՄܽ ։ൃதͷAPI

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௕ظతʹӡ༻ = ։ൃͷ͠΍͢͞΋ॏཁ ։ൃதͷAPI

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ߴ͍৴པੑ ϋΠύϑΥʔϚϯε ։ൃͷ͠΍͢͞

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ߴ͍৴པੑ ϋΠύϑΥʔϚϯε ։ൃͷ͠΍͢͞ ʴ ৽͍͠ݴޠΛ࠾༻͢ΔͳΒ ֶशίετ΋཈͍͑ͨ

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GolangΛ࠾༻͠·ͨ͠ “Gopher” illustration by © Renee French

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Golangͷಛ௃ “Gopher” illustration by © Renee French

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Golangͷಛ௃ “Gopher” illustration by © Renee French ߴ͍৴པੑ

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Golangͷಛ௃ “Gopher” illustration by © Renee French ίϯύΠϥʔݴޠ ϓϩάϥϜΛ༧Ίػցޠʹ຋༁ ʢίϯύΠϧʣ

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Golangͷಛ௃ “Gopher” illustration by © Renee French ίϯύΠϥʔݴޠ ίϯύΠϧ͍ͭͰʹ ࣗಈͰॲཧͷ࠷దԽ·Ͱߦ͏

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Golangͷಛ௃ “Gopher” illustration by © Renee French ίϯύΠϥʔݴޠ ػցޠΛ௚઀࣮ߦ͢ΔͷͰ ͱͯ΋ߴ଎

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Golangͷಛ௃ “Gopher” illustration by © Renee French ίϯύΠϥʔݴޠ ίϯύΠϧ࣌ʹίϯύΠϧΤϥʔΛݕग़ όά͕͔ͳΓݮΔ

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Fatal error: Call to undefined function doSomething() εΫϦϓτݴޠ͋Δ͋Δ ະఆٛͷؔ਺Λݺͼग़͠

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Fatal error: Call to undefined function doSomething() εΫϦϓτݴޠ͋Δ͋Δ ࣮ߦ͞ΕΔ·Ͱ෼͔Βͳ͍

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Fatal error: Call to undefined function doSomething() εΫϦϓτݴޠ͋Δ͋Δ GolangͳΒ ίϯύΠϧ࣌ʹݕग़Մೳ

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Golangͷಛ௃ “Gopher” illustration by © Renee French ੩తܕ෇͚ શͯͷม਺ͷσʔλܗࣜʢܕʣ͕ݻఆ

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Golangͷಛ௃ “Gopher” illustration by © Renee French ੩తܕ෇͚ ܕ͕Ұக͠ͳ͍ͱίϯύΠϧΤϥʔ ࣮ߦ࣌ΤϥʔΛ્ࢭ

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Fatal error: Call to a member function someMethodCall() on array εΫϦϓτݴޠ͋Δ͋Δ ഑ྻʹରͯ͠ϝιουݺͼग़͠

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Fatal error: Call to a member function someMethodCall() on array εΫϦϓτݴޠ͋Δ͋Δ ͜Ε΋࣮ߦ͢Δ·Ͱ෼͔Βͳ͍

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Fatal error: Call to a member function someMethodCall() on array εΫϦϓτݴޠ͋Δ͋Δ GolangͳΒ ίϯύΠϧ࣌ʹݕग़Մೳ

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Golangͷಛ௃ “Gopher” illustration by © Renee French Ϣχοτςετͷඪ४αϙʔτ ࣮ߦ͔࣌͠෼͔Βͳ͍ϩδοΫΤϥʔΛ ػցతʹࣗಈͰςετ

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Golangͷಛ௃ “Gopher” illustration by © Renee French Ϣχοτςετͷඪ४αϙʔτ go test ίϚϯυ

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Golangͷಛ௃ “Gopher” illustration by © Renee French Ϣχοτςετͷඪ४αϙʔτ *_test.go ϑΝΠϧΛஔ͍ͯ ςετίʔυΛهड़

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Golangͷಛ௃ “Gopher” illustration by © Renee French Ϣχοτςετͷඪ४αϙʔτ ඪ४Ͱ༻ҙ͞Ε͍ͯΔ testing ύοέʔδΛར༻

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Golangͷಛ௃ “Gopher” illustration by © Renee French Ϣχοτςετͷඪ४αϙʔτ ίϯιʔϧͰ go test Λ࣮ߦ ʹ ςετ͕ߦΘΕΔ

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Golangͷಛ௃ “Gopher” illustration by © Renee French Ϣχοτςετͷඪ४αϙʔτ ϕϯνϚʔΫ΋ඪ४ରԠ
 go test -bench

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Golangͷಛ௃ “Gopher” illustration by © Renee French Ϣχοτςετͷඪ४αϙʔτ ੵۃతʹςετΛॻ͘Α͏ʹͳͬͨ ʢ౰ࣾൺʣ

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Golangͷಛ௃ “Gopher” illustration by © Renee French ։ൃͷ͠΍͢͞

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Golangͷಛ௃ “Gopher” illustration by © Renee French ֶशίετͷ௿͞ Ͱ͖Δ͚ͩෳࡶͳίʔυΛආ͚ͨઃܭ

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Golangͷಛ௃ “Gopher” illustration by © Renee French ֶशίετͷ௿͞ ඇৗʹ୹ظؒͰֶशՄೳ

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Golangͷಛ௃ “Gopher” illustration by © Renee French ֶशίετͷ௿͞ ฐࣾྫɿܦݧऀθϩͷঢ়ଶ͔Β 3िؒͰαʔϏεϩʔϯν

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Golangͷಛ௃ “Gopher” illustration by © Renee French ։ൃεϐʔυ ੩తܕ෇͚͕ͩɺ୹͍ߏจͰදݱՄೳ

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Golangͷಛ௃ “Gopher” illustration by © Renee French ։ൃεϐʔυ ίϯύΠϧΤϥʔ͕ݕग़Ͱ͖ΔͷͰ ࣮ߦ࣌Τϥʔ͕গͳ͘ͳΔ

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Golangͷಛ௃ “Gopher” illustration by © Renee French ։ൃεϐʔυ ಉ͡඼࣭ͷ΋ͷΛ໨ࢦͤ͹ ܾͯ͠஗͘ͳ͍

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ISUCON

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Iikanjini Speed Up CONtest ʢ͍͍ײ͡ʹεϐʔυΞοϓίϯςετʣ ISUCON

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όοΫΤϯυքͷεϐʔυϨʔε ISUCON

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ݶΒΕͨ࣌ؒ಺ͰɺͲ͜·Ͱ ύϑΥʔϚϯε্͕͛ΒΕΔ͔Λڝ͏ ISUCON

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ݶΒΕͨ࣌ؒ಺ͰɺͲ͜·Ͱ ύϑΥʔϚϯε্͕͛ΒΕΔ͔Λڝ͏ ISUCON

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ݶΒΕͨ࣌ؒ಺ͰɺͲ͜·Ͱ ύϑΥʔϚϯε্͕͛ΒΕΔ͔Λڝ͏ ISUCON ։ൃεϐʔυ໋͕ ↓

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ISUCONຊઓ
 ར༻ݴޠϥϯΩϯά ISUCON

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ISUCON 3 (2013) ISUCON 4 (2014) ISUCON5 (2015) 1Ґ Perl 44% Ruby 33.3% 10૊ Ruby 44% 11૊ 2Ґ Ruby 36% Go 30.0% 9૊ Go 32% 8૊ 3Ґ Python 12% Perl 20.0% 6૊ Perl 28% 7૊ 4Ґ Go Node.js PHP 4% PHP 16.6% 5૊ LUA
 Shell Javascript 4% 1૊ ISUCON Ref: http://isucon.net

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ISUCON 3 (2013) ISUCON 4 (2014) ISUCON5 (2015) 1Ґ Perl 44% Ruby 33.3% 10૊ Ruby 44% 11૊ 2Ґ Ruby 36% Go 30.0% 9૊ Go 32% 8૊ 3Ґ Python 12% Perl 20.0% 6૊ Perl 28% 7૊ 4Ґ Go Node.js PHP 4% PHP 16.6% 5૊ LUA
 Shell Javascript 4% 1૊ ISUCON Golang͕2೥࿈ଓͰຊઓ2Ґ֫ಘ Ref: http://isucon.net

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ISUCON 3 (2013) ISUCON 4 (2014) ISUCON5 (2015) 1Ґ Perl 44% Ruby 33.3% 10૊ Ruby 44% 11૊ 2Ґ Ruby 36% Go 30.0% 9૊ Go 32% 8૊ 3Ґ Python 12% Perl 20.0% 6૊ Perl 28% 7૊ 4Ґ Go Node.js PHP 4% PHP 16.6% 5૊ LUA
 Shell Javascript 4% 1૊ ISUCON ͭ·Γ։ൃεϐʔυ͸े෼ʹ଎͍ Ref: http://isucon.net

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Golangͷಛ௃ “Gopher” illustration by © Renee French ύϑΥʔϚϯε

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Golangͷಛ௃ “Gopher” illustration by © Renee French ࣮ߦ଎౓ APIͰ؊ʹͳΔͷ͕Ϩεϙϯεͷ଎౓

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Golangͷಛ௃ “Gopher” illustration by © Renee French ࣮ߦ଎౓ ॲཧ͕࣌ؒ୹͚Ε͹ ୯Ґ࣌ؒ͋ͨΓʹΑΓଟ͘ࡹ͚Δ

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Golangͷಛ௃ “Gopher” illustration by © Renee French ࣮ߦ଎౓ Golang͸ίϯύΠϥʔܕͳͷͰ ࣮ߦ଎౓͸ஶ͘͠଎͍

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Golangͷಛ௃ “Gopher” illustration by © Renee French ࣮ߦ଎౓ ؆୯ͳॲཧͳΒϚΠΫϩඵϨϕϧ

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Golangͷಛ௃ “Gopher” illustration by © Renee French ࣮ߦ଎౓ ฐࣾྫɿ࣮ࡍʹ։ൃதͷAPI͸ 1msະຬͰॲཧΛऴ͑Δ͜ͱ΋

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Golangͷಛ௃ “Gopher” illustration by © Renee French ࣮ߦ଎౓ Ծʹ200msΛ20msʹݮΒͤΕ͹ ୯Ґ࣌ؒ͋ͨΓ10ഒͷϦΫΤετΛࡹ͚Δ

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Golangͷಛ௃ “Gopher” illustration by © Renee French ࣮ߦ଎౓ APIʹ࠷ద

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ͲͷΑ͏ʹઃܭ͢Δ͔ “Gopher” illustration by © Renee French

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ͲͷΑ͏ʹઃܭ͢Δ͔ “Gopher” illustration by © Renee French ύϑΥʔϚϯεͷ޲্

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Golangͷಛ௃ “Gopher” illustration by © Renee French ߴ଎ͳύοέʔδͷબ୒ ࣮૷ʹΑͬͯύϑΥʔϚϯε͸ ܻҧ͍ʹҟͳΔ

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Golangͷಛ௃ “Gopher” illustration by © Renee French ߴ଎ͳύοέʔδͷબ୒ WAFͷ࣮ྫɿMartini ͸ඇৗʹ஗͘ ۙ೥ओྲྀͷ Echo ΍ Gin ͳͲ͸଎͍

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Golangͷಛ௃ “Gopher” illustration by © Renee French ߴ଎ͳύοέʔδͷબ୒ ෳ਺ͷύοέʔδΛ ϕϯνϚʔΫͰςετ͢Δ

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Golangͷಛ௃ “Gopher” illustration by © Renee French ߴ଎ͳύοέʔδͷબ୒ ΘΓͱϕϯνϚʔΫ݁Ռ΋ ଟ͘ग़ճ͍ͬͯ·͢

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Golangͷಛ௃ “Gopher” illustration by © Renee French fasthttp ࣮ྫ

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Golangͷಛ௃ “Gopher” illustration by © Renee French fasthttp ඪ४ϥΠϒϥϦΑΓ΋ߴ଎Խͨ͠ HTTPαʔόʔ

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Golangͷಛ௃ “Gopher” illustration by © Renee French fasthttp ඪ४ͷ net/http ͸ ϝϞϦΞϩέʔγϣϯ͕ඇޮ཰

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Golangͷಛ௃ “Gopher” illustration by © Renee French fasthttp ϝϞϦޮ཰Λൈຊతʹվળ

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Golangͷಛ௃ “Gopher” illustration by © Renee French ߴ଎ͳύοέʔδͷબ୒ ௒ߴස౓ͳϦΫΤετʹର͢Δ ύϑΥʔϚϯε͸਺ഒվળ

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Golangͷಛ௃ “Gopher” illustration by © Renee French ߴ଎ͳύοέʔδͷબ୒ ຊՈ net/http ΑΓ͸ϝϯςස౓௿Ί ಋೖ͸৻ॏʹ

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ͲͷΑ͏ʹઃܭ͢Δ͔ “Gopher” illustration by © Renee French ςετϑΝʔετ

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Golangͷಛ௃ “Gopher” illustration by © Renee French ಠཱੑͷߴ͍࣮૷ TDDͱ͸ݴΘͳ͍·Ͱ΋ ςετ͸Ͱ͖ΔݶΓ100%ߦ͍͍ͨ

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Golangͷಛ௃ “Gopher” illustration by © Renee French ಠཱੑͷߴ͍࣮૷ Golang͸ύοέʔδ୯ҐͰ ࡉ͔͘ϢχοτςετΛॻ͘࢓༷

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Golangͷಛ௃ “Gopher” illustration by © Renee French ಠཱੑͷߴ͍࣮૷ DBΞΫηεΛந৅Խ͢ΔͳͲɺ ґଘͷͳ͍࣮૷Λ໨ࢦ͢

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Golangͷಛ௃ “Gopher” illustration by © Renee French ಠཱੑͷߴ͍࣮૷ DBΞΫηεͷςετͳͲ͸ DockerΛར༻

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Golangͷಛ௃ “Gopher” illustration by © Renee French ಠཱੑͷߴ͍࣮૷ ςετίʔυ͔Β Docker্ཱ͕ͪ͛ΒΕΔ

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Golangͷಛ௃ “Gopher” illustration by © Renee French ಠཱੑͷߴ͍࣮૷ ςετ͝ͱʹDockerίϯςφΛ্ཱͪ͛ DBΛॳظԽͯ͠ςετ

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Golangͷಛ௃ “Gopher” illustration by © Renee French ಠཱੑͷߴ͍࣮૷ ͜͜·ͰGoͷίʔυ͚ͩͰ࣮ݱͰ͖·͢

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ͲͷΑ͏ʹઃܭ͢Δ͔ “Gopher” illustration by © Renee French σϓϩΠϝϯτ

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Golangͷಛ௃ “Gopher” illustration by © Renee French ΋ͬͱ΋؆୯ͳσϓϩΠ Ϗϧυͨ͠όΠφϦΛ ಥͬࠐΉ͚ͩ

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Golangͷಛ௃ “Gopher” illustration by © Renee French σʔϞϯԽ σʔϞϯԽ͢ΔύοέʔδΛར༻

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Golangͷಛ௃ “Gopher” illustration by © Renee French σʔϞϯԽ ·ͨ͸ΤʔδΣϯτΛ༻͍ͯ ؒ઀తʹσʔϞϯԽ

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Golangͷಛ௃ “Gopher” illustration by © Renee French Docker DockerͰίϯςφ࡞੒ ίϚϯυͻͱͭͰͲ͜Ͱ΋࣮ߦ

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Golangͷಛ௃ “Gopher” illustration by © Renee French CIͰϏϧυ ϩʔΧϧͰͷϏϧυͷ୅ΘΓʹ CIͰςετ&Ϗϧυ

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Golangͷಛ௃ “Gopher” illustration by © Renee French CIͰϏϧυ CircleCIͳͲ͸GolangʹରԠ GitHub΁ͷPushͰࣗಈϏϧυ

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Golangͷಛ௃ “Gopher” illustration by © Renee French CIͰϏϧυ Ϗϧυޙ͸ࣗಈσϓϩΠ PushҎޙ͸શͯࣗಈԽ

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Golangͷಛ௃ “Gopher” illustration by © Renee French Amazon Web Service AWSͳΒCode DeployͳͲΛར༻

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Golangͷಛ௃ “Gopher” illustration by © Renee French Google App Engine GAEͳΒίϯιʔϧ͔Β ਺ճͷίϚϯυͰσϓϩΠ

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͕࣌ؒ͋Ε͹࿩͢͜ͱ

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͕࣌ؒ͋Ε͹࿩͢͜ͱ • GoͰྑ͔ͬͨ͜ͱ • ฒྻॲཧ͕༰қ → ؆୯ʹCPUੑೳΛ࢖͍੾ΕΔ • ඪ४ϥΠϒϥϦ͕ॆ࣮ → SMTP΍HTTPͷαʔόʔɺ҉߸Խ͔Βը૾ॲཧ·Ͱʂ • ֎෦ϥΠϒϥϦͷಋೖ͕ඇৗʹָ → githubͳͲͷϦϙδτϦURLΛࢦఆ͢Δ͚ͩ • ґଘؔ܎ͷ೰Έ͕ͳ͍ → Go 1.5͔ΒVendoringʹରԠ • ඪ४ͰςετػೳΛ಺ଂ → Ϣχοτςετ΍ϕϯνϚʔΫɺίʔυͷղੳɾݕূ·Ͱ • ඪ४Ͱιʔείʔυͷίϝϯτ͔ΒυΩϡϝϯτΛࣗಈੜ੒ • ଞͷίϯύΠϧܕݴޠͱൺֱͨ͠ಛ௃ • ίϯύΠϧ͕ߴ଎ → ޮ཰తͳґଘؔ܎ղੳ΍֊૚ߏ଄Λ࣋ͨͳ͍ܕͳͲɺߴ଎ʹίϯύΠϧͰ͖Δ ઃܭ • ΨϕʔδίϨΫγϣϯ → ϝϞϦʔͷղ์ʹ಄Λ೰·ͤͳͯ͘ࡁΉɻgo1.5Ͱେ෯ʹߴ଎Խ • ࣮ߦϑΝΠϧ1ͭʹશͯΛύοΩϯά → Ϗϧυ͑͢͞Ε͹ґଘؔ܎Λؾʹ͠ͳ͍͍ͯ͘

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• Goͷઃܭࢥ૝ → அࣺ཭ϕʔεɻόάͷੜΈʹ͘͞ͱཧղͷ͠΍͢͞ɺߴ଎͞Λॏࢹͨ͠ઃܭ • FAQ͕ͱͯ΋ॆ࣮ → ઃܭࢥ૝͕ॻ͖࿈Ͷͯ͋Δ • ྫ֎͕ͳ͍ → ʮྫ֎͸ίʔυΛෳࡶʹ͢ΔͨΊʯ • ؔ਺΍ԋࢉࢠͷΦʔόʔϩʔυ͕ͳ͍ → ʮࠞཚ΍όάͷݩɻແ͍΄͏͕ͣͬͱγϯϓϧʯ • δΣωϦΫε͕ͳ͍ → ʮকདྷతʹ͸ಋೖͷՄೳੑɻݱࡏ͸ϕετͳઃܭΛ໛ࡧதʯ • ඪ४ͷςετεΠʔτʹΞαʔγϣϯ͕ͳ͍ → ʮਖ਼͍͠ΤϥʔॲཧͱϨϙʔτͷهड़Λଅͨ͢Ίʯ • Goʹ͓͚Δ໰୊఺ • interface{} → ܕγεςϜͷར఺͕࡟͕ΕΔɺ΍ͬͺΓδΣωϦΫεཉ͍͠ • ࡉ͔͍࢓༷·Ͱཧղ͠ͳ͍ͱࢥΘͣόάΔ͜ͱ͸·ͩ͋Δ → Sliceͷ࢓༷͸᠘ • gccgoͷ։ൃ͕ؒʹ߹ͬͯͳ͍ → Go1.5Ҏ߱͸ϏϧυࡁΈόΠφϦΛಋೖ͢Δ͔1.4ܥͷΠϯετʔ ϧ͕ඞཁɻͦͯ͠gc͸gccgoΑΓ஗͍ʢͦΕͰ΋े෼଎͍͕ʣ ͕࣌ؒ͋Ε͹࿩͢͜ͱ

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͝੩ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠