Firebase Analytics で画像ロードのパフォーマンス を測定し、改善をした話

by Motoi Washida

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'JSFCBTF"OBMZUJDTד 歗⫷ٗ٦سךػؿؓ٦وٝأ  ׾庠㹀׃ծ何㊣׾׃׋鑧 5VOOFM吳䒭⠓爡  똲歊㛇

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荈䊹稱➜ ˖ 5XJUUFS!XN ˖ "OESPJEؒٝآص، J04瘝׮װ׷ ˖ 3PPN$MJQהְֲ؎ٝذٔ،ⱖ溪ך $(.׾Ꟛ涪⚥

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כׄ׭ח

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3PPN$MJQהכ 鿇㾊ךⱖ溪׾Ⱏ剣ׅ׷،فٔ

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3PPN$MJQהכ ׫׿זך　秛ظؐعؐծ%*:⡲ㅷծ˘

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3PPN$MJQהכ 㩲鿇㾊ծؔةؙ鿇㾊זו׮

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3PPN$MJQהכ ׫׿זך鿇㾊ךⱖ溪ָ♰卐

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׮׃ַ׃ג猘ך鿇㾊ծ寅ֺׅ

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歗⫷铣׫鴥׫ך  鸞ׁכהג׮ꅾ銲 ׃ַ׃

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ِ٦ؠ٦ׁ׿ך㡮

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ِ٦ؠ٦ׁ׿ך㡮

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鹼ְ⭐

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ِ٦ؠ٦ׁ׿ך㡮

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鹼ְ

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ِ٦ؠ٦ׁ׿ך㡮

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鹼ְ

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⦐➂涸ז䠐鋅

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׏גְֲַ劤䔲ח鹼ְ 

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鸞ֻ׃׋ְ

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歗⫷ٗ٦س鸞ֻׅ׷ ׊

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歗⫷ٗ٦س׾鸞ֻׅ׷ ׋׭חׅ׷ץֹ✲

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וֲׅ׸ל歗⫷ٗ٦س ָ傍ֻז׷׌׹ֲ

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歗⫷׾⯓铣׫׃״ֲ

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ٍؗحءُ㟓װ׉ֲ

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搀꼽ז؝٦س׾  嶊׉ֲ

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؟٦غ٦؟؎س  ד׮锃ץג׮׵ֲֶ

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זו葿ղ倵瘻כ֮׷ ׋׌׃׉ך⵸ח˘

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䩛׾⹛ַׅ⵸ח  罋ִג׫״ֲ

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Ⰻ鿇װ׸תַׅ

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׉ך倵瘻  劤䔲ח⸬卓֮׶תׅ

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劤䔲כ㔭׏גְ׷➂  קה׿וְזְַ׮

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꠹ꨡח倵瘻׾׃ג׮  倵瘻ך⸬卓ָ鋅ִזְ

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׉׮׉׮劤䔲ח鹼ְךַ  ׅ׵㹀ꆀ涸ח庠׸זְ

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װ׷ץֹ✲

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װ׷ץֹ✲ չוך⡘歗⫷邌爙ד䖉׋ׇגְ׷ַպ ׾庠㹀ׅ׷ չ鹼ְ⾱㔓הז׏גְ׷♧殢ך㉏겗պ ׾鍑寸ׅ׷

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'JSFCBTF"OBMZUJDT ח״׷歗⫷ٗ٦سך庠㹀

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չ歗⫷ٗ٦س儗꟦պ  ⡦׾⢪׏ג庠㹀׃״ֲ ַ

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(PPHMF"OBMZUJDT 搀俱ך倯

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荈⵸ד"1*׾⡲׷

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'JSFCBTF"OBMZUJDT

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'JSFCBTF"OBMZUJDT  ךًٔحز

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#JH2VFSZָ⢪ִ׷ 厫鮾חⴓ匿ָדֹ׷

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厫鮾חػًٓ٦ة٦ ׾床ׇ׷ (PPHMF"OBMZUJDT 搀俱晛 כؕأةي䭷垥זוחⵖꣲ

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鎘庠穠卓ָⰋג婍׷ (PPHMF"OBMZUJDT 搀俱晛 כ鎸ꐮדֹ׷؎كٝز侧ח♳ꣲ

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䔲儗محزדְ׆׸獳遤ָ䗳銲חז׶׉ֲ׌׏׋ ($.דכזֻ'$.ָ䱿㤺ׁ׸׷״ֲחז׏׋הַ˘

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וְֲֲ䕎䒭ד鎘庠׃ ״ֲַ

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Ⰻגך铣׫鴥׫儗꟦  ׾鷏⥋ׅ׷

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䎂㖱ٗ٦س儗꟦׾  㹀劍涸ח鷏׷

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ٗ٦س儗꟦׾ꥡ秷ⴽח꧊鎘׃ג 㹀劍涸ח鷏⥋

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鷏⥋ر٦ةך؎ً٦آ

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鷏⥋ر٦ةך؎ً٦آ [ { duration: 2, value: (…2ms ҎԼͷಡΈࠐΈͷճ਺…) }, { duration: 5, value: (…5ms ҎԼͷಡΈࠐΈͷճ਺…) }, { duration: 10, value: (…10ms ҎԼͷಡΈࠐΈͷճ਺…) }, …(தུ)… { duration: 1000, value: (…1ඵ ҎԼͷಡΈࠐΈͷճ਺…) }, { duration: 2000, value: (…2ඵ ҎԼͷಡΈࠐΈͷճ਺…) }, …(தུ)… ] ˞ ࣮ࡍʹ͸+40/Ͱ͸ͳ͘  #VOEMFΦϒδΣΫτͰ౉͠·͢

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3FEBTIד꧊鎘  穠卓׾Ⱏ剣

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3FEBTIח״׷꧊鎘穠卓 ඵҎԼ ڐ༰ൣғ ඵΑΓ஗͍

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3FEBTIח״׷꧊鎘穠卓 ٍؗحءُろ׬ NTҎԼ  ͍͍ͩͨΩϟογϡ ඵҎԼ ڐ༰ൣғ ඵΑΓ஗͍

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歗⫷ٗ٦سך鎘庠穠卓

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׻ַ׏׋✲鹼ְ

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꧊鎘穠卓ַ׵׻ַ׏׋✲ ͷը૾͕දࣔʹ  ඵ଴ͨ͞ΕΔ  Ωϟογϡ͕ͳ͍৔߹

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׻ַ׏׋✲  Ⰻ鿇ָ鹼ְ  ׻ֽדכ搀ְ

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꧊鎘穠卓ַ׵׻ַ׏׋✲ ͷը૾͸  NTະຬͰදࣔ͞ΕΔ

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ֿך穠卓׾⯋ח  䱠׶♴־ג锃叨

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⟎铡طحزٙ٦ָؙ鹼ְךדכ ˖ ؟٦غ٦ⰻד鎘庠׃׋ٖأهٝأכ鸞 ַ׏׋ ⟎铡ؙٓ؎،ٝزָ鹼ְךדכ ˖ ـٓؐؠ晛ַ׵،ؙإأׅ׷ה鸞ְ 锃叨穠卓

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ׁ׵ח锃ץג  倵瘻׾㹋遤

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倵瘻歗⫷ꂁ⥋؟٦غ٦׾㕂ⰻח獳⹛ ˖ ؟٦غ٦ך⼱侧ָ،ًٔؕח֮׏׋׋׭ 倵瘻(MJEFך剑㣐ず儗䱸竲侧׾锃侭 ˖ Ⳣ椚䖉׍ךؙٔؒأزָ׋ת׶鹼ֻז׏גְ׋ 歗⫷ٗ٦س׾鸞ֻׅ׷倵瘻

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倵瘻ה׉ך穠卓

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倵瘻歗⫷ꂁ⥋؟٦ غ٦׾㕂ⰻח獳⹛ׅ׷

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طحزٙ٦ָؙ鹼ַ׏׋⾱㔓 ˖ ؟٦غ٦ך⼱侧ָ،ًٔؕח֮׏׋ ˖ 婍׶ך⼱侧כ傈劤 ،ַًٔؕ׵ךٖأهٝأָ鹼ְ ˖ NT։猱⟃♳ ˖ 傈劤ַ׵ך㜥さכNT⟃ⰻ 锃叨穠卓

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Ⰻ鿇㕂ⰻח獳⹛׃׋

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㕂ⰻח獳⹛׃׋穠卓 ඵҎ্͔͔Δը૾͕  ఔ౓ʹݮগ

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倵瘻(MJEFך剑㣐  ず儗䱸竲侧׾锃侭ׅ׷

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䱸竲♳ꣲ׾馄ִגؙٔؒأزָ䫎־׵׸ גְ׋ ˖ 鹼ְؙٔؒأزָأٖحس׾⽑剣׃ג׃תֲ (MJEFך䱸竲♳ꣲכرؿٕؓزךתת' ˖ رؿٕؓزכ؝،侧 ٍؗحءُ⟃㢩 ˖ ׮׏ה㟓װׇ׷ךדכ 锃叨穠卓

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何㊣ׅ׷׊

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كأزָ׻ַ׵זְ

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鎘庠׃׹

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勴⟝׾ⴖ׶剏ִזָ׵庠㹀 ˖ ず儗䱸竲侧ה䱸竲ف٦ٕ ˖ 畭劣䎂㖱铣׫鴥׫㔐侧׾فٗحز ˖ 猱ח䎂㖱⡦卐歗⫷׾铣׫鴥׭׷ַ ˖ את׶铣׫鴥׫猱侧ך鷞侧鎘庠ׅ׷׊

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剑黝ז鏣㹀׾䱱ׅ ˟طحزٙ٦ؙך锃㶨ָ䝤ֻծ֮ת׶  姻然זؚٓؿחז׏גְתׇ׿կ 铣׫鴥׿׌歗⫷ך侧卐猱剑㣐ず儗䱸竲侧

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剑黝ז鏣㹀׾䱱ׅ ˟طحزٙ٦ؙך锃㶨ָ䝤ֻծ֮ת׶  姻然זؚٓؿחז׏גְתׇ׿կ 铣׫鴥׿׌歗⫷ך侧卐猱 ಉ࣌઀ଓ਺ʹൺྫ 剑㣐ず儗䱸竲侧

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剑黝ז鏣㹀׾䱱ׅ ˟طحزٙ٦ؙך锃㶨ָ䝤ֻծ֮ת׶  姻然זؚٓؿחז׏גְתׇ׿կ 铣׫鴥׿׌歗⫷ך侧卐猱 ಉ࣌઀ଓ਺૿΍ͯ͠΋  ޮՌ͕ͳ͍ 剑㣐ず儗䱸竲侧

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穠卓

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剑㣐ず儗䱸竲侧ך剑黝⦼ ˖ أٖحسֻ׵ְָ剑黝הⴻ倖 ˖ 鸐⥋朐屣如痥דכ㣐ֹֻ׃׋倯ָ葺ְַ׮ ؝طؙءّٝف٦ٕח״׷ 䱸竲 ٍؗحءُ ˖ NTֻ׵ְ鸞ֻז׏׋

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ٔٔ٦أ׃׋

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ず儗䱸竲侧剑黝⻉ך穠卓 ϦϦʔε࣌ظ

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䭁㣐׃ג׫׷ 麩ְָ鋅ִזַ׏׋˘

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ず儗䱸竲侧剑黝⻉ך穠卓䭁㣐 NTະຬ͘Β͍૿͑ͨ ඵҎ্͘Β͍ݮͬͨ

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鸞ֻז׏׋˘

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תה׭

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'JSFCBTF"OBMZUJDTד铣׫鴥׫׾鎘庠׃ג何㊣ ׇׁ׋ ˖ չ鹼ְ⭐պ׫׋ְזٖؽُ٦כ勻זֻז׏׋ ˖ 㹋庠⦼׾⳿ׅ✲ד؝ىُص؛٦ءّٝ׮《׶僒ֻז׏׋ 倵瘻䩧א⵸ח鎘庠ׅ׷ךָꅾ銲 ˖ نزٕطحؙ⟃㢩ח倵瘻׾׃ג׮䠐㄂כזְ ˖ 䱿庠ׅ׷זծ鎘庠ׇ״ תה׭

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ΤϯδχΞืूத ˖ չ׮׏ה鸞ֻדֹ׷״պ ˖ չ،فٔ׾׮׏ה؎؛׋׮ךחדֹ׷״պ ˖ չ꬗涯׉ֲպ ͱ͍͏ํɺ͓ؾܰʹ࿈བྷ͍ͩ͘͞ʂ