msgpack.js RC2 - latest log

Change Log

Retake toIEEE754()
Retake callback arguments in msgpack.download() and msgpack.download()

Test case

Functions

Download and Upload functions
- msgpack.download(url, option, callback) -> download binary data by GET method.
- msgpack.upload(url, option, callback) -> upload base64 data by PUT method.
Pack and Unpack functions
- msgpack.pack(Mix) is converted into ByteArray of the MessagePack format.
  - Mix are undefined, null, Object, Array, String and Number types.
  - ByteArray is [0x00, 0xff, ...] alias.
- msgpack.unpack(ByteArray):Mix is restored.
Support WebWorkers
- msgpack.download(url, { worker: true }, callback)
- msgpack.upload(url, { worker: true }, callback)
- msgpack.worker - String(= "msgpack.js"): WebWorkers script URL
Support Browsers
- A Grade: Google Chrome 4+, Safari5+, Firefox3.6+, Opera10.50+, iPhone 3G+, IE8+
- B Grade: Safari3.1+, Firefox3+, Opera9.6+, IE6+

Sorce Code + Testing environment

http://pigs.sourceforge.jp/blog/msgpack/20100618/msgpack.js
http://pigs.sourceforge.jp/blog/msgpack/20100618/msgpack-20100618.js.zip

Benchmark (JSON vs msgpack)

(unit = ms)
(JSON = JSON.stringify + JSON.parse)
(msgpack = msgpack.pack + msgpack.unpack)

Create 100000

	JSON	msgpack	rario(RC2)	ratio(RC1)
Chrome 6(dev)	3883	2055	190%	170%
Safari 5	682	2762	25%	21%
Firefox 3.6.3	822	5805	14%	---
Opera 10.60β(3422)	510	1700	30%	25%

Load 10000

	JSON	msgpack	rario(RC2)	ratio(RC1)
Chrome 6(dev)	168	164	102%	---
Safari 5	29	235	12%	---
Firefox 3.6.3	39	501	8%	---
Firefox 3.0	588	621	95%	---
Opera 10.60β(3422)	48	163	30%	31%
IE 8	187	1594	11%	---
IE 6	6188	10344	60%	---
iPhone 3GS(iOS4)	324	2390	13%	11%

Create 1000

	JSON	msgpack	rario(RC2)	ratio(RC1)
Chrome 6(dev)	15	18	83%	---
Safari 5	5	22	22%	17%
Firefox 3.6.3	6	11	54%	---
Firefox 3.0	60	62	96%	---
Opera 10.60β(3422)	5	15	30%	27%
IE 8	16	141	11%	---
IE 6	625	719	87%	---
iPhone 3GS(iOS4)	33	235	14%	11%

How to use

// msgpack.pack(), msgpack.unpack()

<script src="msgpack.js"></script>
<script>
var byteArray = msgpack.pack({ hello: "world" });

alert( msgpack.unpack(byteArray).hello ); // world
</script>

// msgpack.download() with WebWorkers

<script src="msgpack.js"></script>
<script>
function callback(data, option, response) {
    if (response.ok) {
        alert( data );  // Mix (JavaScript Object)
    } else {
        alert( "ERROR STATUS = " + response.status ); // xhr.status
    }
}

// set worker script path
// msgpack.worker = "http://example.com/js/msgpack.js";

msgpack.download(url, { worker: true }, callback);
</script>

// msgpack.upload() with WebWorkers

<script src="msgpack.js"></script>
<script>
function callback(data, option, response) {
    if (response.ok) {
        alert( data ); // xhr.responseText (optional)
    } else {
        alert( "ERROR STATUS = " + response.status ); // xhr.status
    }
}

// set worker script path
// msgpack.worker = "http://example.com/js/msgpack.js";

var mix = { hello: "world" };

msgpack.upload("http://example.com/upload.php",
               { worker: true, data: mix, timeout: 5 }, callback);
</script>

// upload.php

<?php
// see http://php.net/manual/en/features.file-upload.put-method.php
$data = fopen("php://input", "r");
$fp = fopen("msgpack.bin", "w");        // output filename

while ($part = fread($data, 8192)) {    // 8192 bytes
    fwrite($fp, base64_decode($part));  // base64 decode
}

fclose($fp);
fclose($data);

print_r(getallheaders());
 ?>

反省会

「勢いしか感じられない」テイストだった toIEEE754() 相当の処理を入れ替えました。
- 中身は edvakf さんのコードほぼそのまま参考にさせてもらいました。edvakf さん。ありがとうございます。
msgpack.download() と msgpack.download() の callback引数を変えました。
IEEE754 変換処理の差し替え、GC発生抑止、inline展開、名前解決速度の向上により、ちょっと速くなってます。
- 残念なことに、最適化したらソースコードに仕込んでおいたキノコマークの居場所がなくなりました。
  - 最適化しつつ、ソースコードに Identity を埋め込めないようでは、まだまだ変態技術者Lvが低いということか…

    // --- minify ---
    _0x100000000000000 = 0x100000000000000,
    _0x1000000000000 =     0x1000000000000,
    _0x10000000000 =         0x10000000000,
    _0x100000000 =             0x100000000,
    _0x1000000 =                 0x1000000,
    _0x10000 =                     0x10000,
    _0x100 =                         0x100,
    _0xff =    /*              */     0xff,
    _0x80 =                           0x80,
    _0x8000 =                       0x8000,
    _0x80000000 =               0x80000000,
    _00000000000 =            "00000000000",