io.js 東京Node学園 15時限目

io.js 東京Node学園の15時限目の資料です。

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1. io.js
   !ZPTVLF@GVSVLBXB
   ౦ژ/PEFֶԂ࣌ݶ໨ࢿྉ
   

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2. !ZPTVLF@GVSVLBXB
   /PEFKT೔ຊϢʔβʔάϧʔϓ୅ද%F/"ॴଐ
   

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3. վΊ…
   

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4. !ZPTVLF@GVSVLBXB
   /PEFJPKT೔ຊϢʔβʔάϧʔϓ୅ද%F/"ॴଐ
   

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5. io.jsͱ͸Կ͔
   

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6. Node.jsͷ
   friendly fork
   

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7. friendly fork??
   લ͸sporkͬͯॻ͍ͯ͋ͬͨ
   

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8. fork
   

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9. spork
   

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10. spork
    fork͸͢Δ͚ͲɺϑΥʔΫ΄Ͳઌ͕Θ͔Ε͍ͯͳ͍ɻ
    ࢥ͍͸ಉ͡ɺͱ͍͏ҙຯͰͷfriendly fork
    

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11. Node.jsͱͷҧ͍
    

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12. ϓϩδΣΫτͷऔΓ૊Έํ
    

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13. io.js͸ΦʔϓϯΨόφϯεϞσϧ
    issue΍featureͷղܾΛΦʔϓϯʹ͢Δ࢓૊Έ
    

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14. io.js͸ΦʔϓϯΨόφϯεϞσϧ
    ೋिؒʹҰճ͘Β͍ͷλΠϛϯάͰTC Meeting͕ߦΘΕɺϋϯάΞ΢τͷ࿥
    ըͱٞࣄ࿥͕ల։͞ΕΔɻissue΍featureΛॲཧ͢Δͷ͸جຊతʹ߹੍ٞɺͨ
    ͩ͠ҙݟׂ͕ΕͨΒvoteͰܾΊΔɻ
    

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15. ΦʔϓϯΨόφϯεʹΑͬͯissue/
    featureͷಁ໌ੑΛ֬อ͠ɺίϯτϦ
    Ϗϡʔτ͠΍͘͢͢Δ
    

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16. ΦʔϓϯΨόφϯεʹΑͬͯissue/
    featureͷಁ໌ੑΛ֬อ͠ɺίϯτϦ
    Ϗϡʔτ͠΍͘͢͢Δ
    1݄͚ͩͰ294ίϛοτ
    

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18. ৽͘͠Committer͕6ਓ௥Ճ
    

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19. ΦʔϓϯΨόφϯεʹΑΔಁ໌ੑͷ֬อ
    ͱio.js΁ͷظ଴͔Βίϛοτ਺ɺίϯτ
    ϦϏϡʔλʔ਺͕૿͑ͯΞΫςΟϒʹɻ
    

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20. Node.jsͱͷ

    ػೳ໘Ͱͷҧ͍
    

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21. v8ͷόʔδϣϯ
    v4.1.0.14
    

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22. σϑΥϧτͰ࢖͑Δ
    let/const
    generators
    Binary/Octal Literal
    Template String Literal
    String new methods
    

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23. "use strict";
    // const
    const koa = require('koa');
    const app = koa();
    // generator
    app.use(function *(next){
    // let block scope
    let start = new Date;
    // yield ඇಉظݺͼग़͠ΛݮΒͤΔ
    yield next;
    let ms = new Date - start;
    // template string literal
    this.set('X-Response-Time', `${ms}ms`);
    });
    app.use(function *(next){
    let start = new Date;
    yield next;
    let ms = new Date - start;
    console.log(`{this.method} {this.url} - ms`);
    }); ͜Μͳ෩ʹॻ͚Δ
    

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24. --es_stagingΛ͚ͭΕ͹࢖͑Δ
    class
    Enhanced Object Literal
    Symbol.toStringTag
    

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25. "use strict";
    // class
    class Person {
    constructor(name, age) {
    this.name = name
    this.age = age
    }
    getInfo() {
    let name = this.name;
    let age = this.age;
    let nextAge = this.age + 1;
    // enhanced object literal
    return {
    name,
    age,
    nextAge
    };
    }
    }
    // @@toStringTag ෇͚ͳ͍ͱ [object object]
    Person.prototype[Symbol.toStringTag] =
    "Person";
    var alice = new Person('alice', 13);
    var bob = new Person('bob', 15);
    console.log('' + alice);
    console.log(bob.getInfo());
    ͜Μͳ෩ʹॻ͚Δ
    

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26. ҎԼͷػೳ͸ݸผʹϑϥά͕ඞཁ
    arrow_functions
    proxy
    Array new methods
    unicode
    ΋͏͠͹͓͠଴ͪΛɻ
    

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27. ৽API௥Ճ
    V8
    

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28. heap౷ܭ͕औΕΔ
    v8Φϓγϣϯ͕adhocʹઃఆͰ͖Δ
    

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29. "use strict";
    const v8 = require('v8');
    // gcΛtrace͢ΔΦϓγϣϯΛONʹ͢Δ
    v8.setFlagsFromString('--trace-gc');
    for (let i=0; i< 10000; i++) {
    // ώʔϓͷ౷ܭΛऔΔ
    console.log(v8.getHeapStatistics());
    global.gc();
    }
    // 10ඵ͚ؒͩv8ͷGCΛtrace͠ɺ͕࣌ؒա͗ͨΒOFFʹ͢Δ
    setTimeout(function(){
    v8.setFlagsFromString('--notrace-gc');
    }, 10 * 1000);
    

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30. ͋ͱ͸ࡉ͔͘…
    simple creatation Stream

    assert.deepStrictEqual
    util.debuglog
    etc…
    

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31. Node.jsͱͷ

    ੑೳ໘Ͱͷҧ͍
    

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32. http͚ͩͰbench
    

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33. http͚ͩͰbench
    4%΄Ͳ޲্
    http_parser͸ಉ͡(2.3.0)ͷͨΊɺ

    ͦ͜·ͰมԽ͸ແ͍ɻ
    

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34. fs, net, tlsΛؚΊͯ
    

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35. fs, net, tlsΛؚΊͯ
    શମతʹ10%ఔ౓ͷ޲্ɻ
    

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36. ͦͷଞ io.jsͷ࠷৽
    χϡʔε
    

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37. ͜ΕݟΕ͹

    ͍͍ͩͨҰൃ
    https://www.youtube.com/watch?v=1IOukA10QeQ
    

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38. Atom/NW.js͕io.jsʹ
    Travis CI΋ io.jsΛαϙʔτ
    Codeship΋io.jsΛαϙʔτ
    Tessel΋αϙʔτ…
    

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39. io.jsͷ׆ಈΛNode
    Ϣʔβʔάϧʔϓ͸Ͳ
    ͏͢Δ͔ɻ
    

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40. ੵۃతʹਐΊ͍ͯ͘
    

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41. ಛʹࠓ͸Nodeͱiojs
    Ͳͬͪ࢖ͬͨΒ͍͍
    ͔ࠞཚͯ͠Δ࣌ظ
    

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42. օͰٞ࿦ΛਐΊ͍ͨ
    NodeͱiojsͷࠞཚΛ
    ೔ຊͰ͸๷͍͗ͨɻ
    

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43. iojsͷ຋༁Λߦ͏
    nodeͱiojsͷੑೳΛܧଓͯ͠ଌΔ
    ΑΓΞΫςΟϒʹٞ࿦Λߦ͑ΔΑ
    ͏ʹ͢Δ
    ۩ମతʹ
    

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44. https://iojs-jp-slack.herokuapp.com/
    

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