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本当にあった爆速でコードをレガシー化させる怖い話
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SatoshiMoriya
November 22, 2018
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本当にあった爆速でコードをレガシー化させる怖い話
SatoshiMoriya
November 22, 2018
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Transcript
രͰίʔυΛ ϨΨγʔԽͤ͞Δා͍ ϨΨγʔײँͷ !TIJHFTIJCV ຊʹ͋ͬͨ
XIPBNJ w 4BUPTIJ.PSJZBʢ!TIJHFTIJCVʣ w 4PGUXBSF&OHJOFFS w ࣗࣾXFCαʔϏεͷ։ൃνʔϜʢZʣ w 4DSVN.BTUFS w
SFNPUFXPSLFSʢݝࡏॅʣ
ϨΨγʔίʔυͷఆٛʁ
ςετ͕ͳ͍ υΩϡϝϯτ͕ͳ͍ ࣮ߦڥ͕ෳࡶ ։ൃڥͭ͘Εͳ͍
։ൃνʔϜ͕ ϨΨγʔͩͱࢥͬͨͦͷ͔Β ͦͷίʔυϨΨγʔίʔυͱͳΔ ʢ㲈ίʔυͷΦʔφγοϓͷࣦʣ
ຊʹ͋ͬͨ
QIBTFʢZʣ w ։ൃձࣾʹXFCαΠτɺཧπʔϧͳͲͷ։ൃΛؙ͛ w ࠣࡉͳमਖ਼ʹ༧ࢉɺೲظͷ͕ൃੜ
10 ͬͯΒΕΜʂ ࣗલͷ։ൃνʔϜ࡞Ζ͏ʂ
QIBTFʢZʣ w ࣾһʴۀҕୗͰνʔϜ݁ w XFCαΠτݴޠΛม͑ͯϦχϡʔΞϧ ʢཧπʔϧͳͲҰ෦ͦͷ··Δʣ w ϦχϡʔΞϧٸ͙͔Βςετॻ͔ͳ͍ w ֤ػೳΛϝϯόʔ͝ͱʹࣗ༝ʹ։ൃ
FY όονͦͷˠQIQ όονͦͷˠKBWB σϓϩΠπʔϧˠSVCZ
-FBE&OHJOFFS Γ͍ͨ͜ͱ͋Γ͗͢Δʂ ͡ΌΜ͡ΌΜΤϯδχΞ૿ͦ͏
QIBTFʢZʣ w ෆ҆ఆͳνʔϜϝϯόʔʢͰ૯ਓҎ্͕ؔΘΓɺ ͬͨͷਓʣ w ͦΕͧΕ͕ڵຯΛٕͭज़Λ࣋ͪࠐΉ
Θ͔ͣͰ ϨΨγʔʢͱ։ൃνʔϜ͕ࢥ͏ʣ ίʔυ͕ྔ࢈͞ΕΔ݁Ռʹ
Զͨͪͷઓ͍͔͜͜Βͩ ʢQIBTFͷͦͷޙʣ
ϨΨγʔͱͱʹาΉ w ϖΞϓϩɺϞϒϓϩͰεΩϧͷฏ४Խ w ৽ػೳϞϒઃܭͰνʔϜશମͰ༷ͷڞ༗Λ w νʔϜϝϯόʔΛແཧʹ૿ͣ͞ɺεΫϥϜΛڧԽͯ͠ϕ ϩγςΟΛ্ͤ͞Δ w εϓϦϯτ͝ͱʹ5FDI.71ΛνʔϜͰબग़ͯ͠ɺϨ
ΨγʔίʔυͷϦϑΝΫλϦϯάʹޫΛͯΔ
ຊʹ͋ͬͨා͍Ξϯνύλʔϯʢʁʣ w ͱΓ͋͑ͣϦχϡʔΞϧ w ͱΓ͋͑ͣςετॻ͔ͳ͍ w ϝϯόʔݸਓͷٕज़తͳґଘ w ։ൃऀͷແཧͳ૿һ w
ओ؍ͱϊϦͰ৽ٕज़Λಋೖ
Ͱຊʹશ෦μϝͳͷʁ w νʔϜϝϯόʔ͕҆ఆ͍ͯ͠ΕɺҰ࣌తʹݸਓʹґଘ͠ ͍͍͔ͯ͠Εͳ͍ w ΞάϨογϒʹٕज़ΛऔΓೖΕΔͷɺεΩϧ͕ฏ४Խ͞ ΕΔϓϩηεͱηοτͳΒྑ͍͔͠Εͳ͍ w ։ൃج൫͕҆ఆ͍ͯ͠ΔͳΒμΠφϛοΫʹਓΛ૿͢͜ ͱͰ͖Δ͔͠Εͳ͍
มΘΓΏ͘ঢ়گͷதͰɺ ։ൃνʔϜ͕ίʔυɺϓϩμΫτͷ ΦʔφʔγοϓΛʢҰࣦ࣌ͬͯʣ࣋ͯΕ ͤͳ։ൃνʔϜʹͳΕΔʢؾ͕͢Δʣ ᘳͳΞϯνύλʔϯͳ͍