# sha256

## JavaScript performance comparison

Revision 9 of this test case created

## Preparation code

``<script src="https://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script><script src="http://www.bichlmeier.info/sha256.js"></script><script src="http://www.webtoolkit.info/djs/webtoolkit.sha256.js"></script><script src="http://crypto-js.googlecode.com/files/2.2.0-crypto-sha256.js"></script><script src="http://point-at-infinity.org/jssha256/jssha256.js"></script><script src="http://code.alexweber.com.br/jquery/sha256/jquery.sha256.js"></script><script src="https://raw.github.com/h2non/jsHashes/master/client/src/hashes.js"></script><script>  var digest;  var input = "jinghaoyan+something@gmail.com"</script><script>  Benchmark.prototype.setup = function() {    function md5cycle(x, k) {    var a = x[0], b = x[1], c = x[2], d = x[3];        a = ff(a, b, c, d, k[0], 7, -680876936);    d = ff(d, a, b, c, k[1], 12, -389564586);    c = ff(c, d, a, b, k[2], 17,  606105819);    b = ff(b, c, d, a, k[3], 22, -1044525330);    a = ff(a, b, c, d, k[4], 7, -176418897);    d = ff(d, a, b, c, k[5], 12,  1200080426);    c = ff(c, d, a, b, k[6], 17, -1473231341);    b = ff(b, c, d, a, k[7], 22, -45705983);    a = ff(a, b, c, d, k[8], 7,  1770035416);    d = ff(d, a, b, c, k[9], 12, -1958414417);    c = ff(c, d, a, b, k[10], 17, -42063);    b = ff(b, c, d, a, k[11], 22, -1990404162);    a = ff(a, b, c, d, k[12], 7,  1804603682);    d = ff(d, a, b, c, k[13], 12, -40341101);    c = ff(c, d, a, b, k[14], 17, -1502002290);    b = ff(b, c, d, a, k[15], 22,  1236535329);        a = gg(a, b, c, d, k[1], 5, -165796510);    d = gg(d, a, b, c, k[6], 9, -1069501632);    c = gg(c, d, a, b, k[11], 14,  643717713);    b = gg(b, c, d, a, k[0], 20, -373897302);    a = gg(a, b, c, d, k[5], 5, -701558691);    d = gg(d, a, b, c, k[10], 9,  38016083);    c = gg(c, d, a, b, k[15], 14, -660478335);    b = gg(b, c, d, a, k[4], 20, -405537848);    a = gg(a, b, c, d, k[9], 5,  568446438);    d = gg(d, a, b, c, k[14], 9, -1019803690);    c = gg(c, d, a, b, k[3], 14, -187363961);    b = gg(b, c, d, a, k[8], 20,  1163531501);    a = gg(a, b, c, d, k[13], 5, -1444681467);    d = gg(d, a, b, c, k[2], 9, -51403784);    c = gg(c, d, a, b, k[7], 14,  1735328473);    b = gg(b, c, d, a, k[12], 20, -1926607734);        a = hh(a, b, c, d, k[5], 4, -378558);    d = hh(d, a, b, c, k[8], 11, -2022574463);    c = hh(c, d, a, b, k[11], 16,  1839030562);    b = hh(b, c, d, a, k[14], 23, -35309556);    a = hh(a, b, c, d, k[1], 4, -1530992060);    d = hh(d, a, b, c, k[4], 11,  1272893353);    c = hh(c, d, a, b, k[7], 16, -155497632);    b = hh(b, c, d, a, k[10], 23, -1094730640);    a = hh(a, b, c, d, k[13], 4,  681279174);    d = hh(d, a, b, c, k[0], 11, -358537222);    c = hh(c, d, a, b, k[3], 16, -722521979);    b = hh(b, c, d, a, k[6], 23,  76029189);    a = hh(a, b, c, d, k[9], 4, -640364487);    d = hh(d, a, b, c, k[12], 11, -421815835);    c = hh(c, d, a, b, k[15], 16,  530742520);    b = hh(b, c, d, a, k[2], 23, -995338651);        a = ii(a, b, c, d, k[0], 6, -198630844);    d = ii(d, a, b, c, k[7], 10,  1126891415);    c = ii(c, d, a, b, k[14], 15, -1416354905);    b = ii(b, c, d, a, k[5], 21, -57434055);    a = ii(a, b, c, d, k[12], 6,  1700485571);    d = ii(d, a, b, c, k[3], 10, -1894986606);    c = ii(c, d, a, b, k[10], 15, -1051523);    b = ii(b, c, d, a, k[1], 21, -2054922799);    a = ii(a, b, c, d, k[8], 6,  1873313359);    d = ii(d, a, b, c, k[15], 10, -30611744);    c = ii(c, d, a, b, k[6], 15, -1560198380);    b = ii(b, c, d, a, k[13], 21,  1309151649);    a = ii(a, b, c, d, k[4], 6, -145523070);    d = ii(d, a, b, c, k[11], 10, -1120210379);    c = ii(c, d, a, b, k[2], 15,  718787259);    b = ii(b, c, d, a, k[9], 21, -343485551);        x[0] = add32(a, x[0]);    x[1] = add32(b, x[1]);    x[2] = add32(c, x[2]);    x[3] = add32(d, x[3]);        }        function cmn(q, a, b, x, s, t) {    a = add32(add32(a, q), add32(x, t));    return add32((a << s) | (a >>> (32 - s)), b);    }        function ff(a, b, c, d, x, s, t) {    return cmn((b & c) | ((~b) & d), a, b, x, s, t);    }        function gg(a, b, c, d, x, s, t) {    return cmn((b & d) | (c & (~d)), a, b, x, s, t);    }        function hh(a, b, c, d, x, s, t) {    return cmn(b ^ c ^ d, a, b, x, s, t);    }        function ii(a, b, c, d, x, s, t) {    return cmn(c ^ (b | (~d)), a, b, x, s, t);    }        function md51(s) {    txt = '';    var n = s.length,    state = [1732584193, -271733879, -1732584194, 271733878], i;    for (i=64; i<=s.length; i+=64) {    md5cycle(state, md5blk(s.substring(i-64, i)));    }    s = s.substring(i-64);    var tail = [0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0];    for (i=0; i<s.length; i++)    tail[i>>2] |= s.charCodeAt(i) << ((i%4) << 3);    tail[i>>2] |= 0x80 << ((i%4) << 3);    if (i > 55) {    md5cycle(state, tail);    for (i=0; i<16; i++) tail[i] = 0;    }    tail[14] = n*8;    md5cycle(state, tail);    return state;    }        /* there needs to be support for Unicode here,     * unless we pretend that we can redefine the MD-5     * algorithm for multi-byte characters (perhaps     * by adding every four 16-bit characters and     * shortening the sum to 32 bits). Otherwise     * I suggest performing MD-5 as if every character     * was two bytes--e.g., 0040 0025 = @%--but then     * how will an ordinary MD-5 sum be matched?     * There is no way to standardize text to something     * like UTF-8 before transformation; speed cost is     * utterly prohibitive. The JavaScript standard     * itself needs to look at this: it should start     * providing access to strings as preformed UTF-8     * 8-bit unsigned value arrays.     */    function md5blk(s) { /* I figured global was faster.   */    var md5blks = [], i; /* Andy King said do it this way. */    for (i=0; i<64; i+=4) {    md5blks[i>>2] = s.charCodeAt(i)    + (s.charCodeAt(i+1) << 8)    + (s.charCodeAt(i+2) << 16)    + (s.charCodeAt(i+3) << 24);    }    return md5blks;    }        var hex_chr = '0123456789abcdef'.split('');        function rhex(n)    {    var s='', j=0;    for(; j<4; j++)    s += hex_chr[(n >> (j * 8 + 4)) & 0x0F]    + hex_chr[(n >> (j * 8)) & 0x0F];    return s;    }        function hex(x) {    for (var i=0; i<x.length; i++)    x[i] = rhex(x[i]);    return x.join('');    }        function md5(s) {    return hex(md51(s));    }        /* this function is much faster,    so if possible we use it. Some IEs    are the only ones I know of that    need the idiotic second function,    generated by an if clause.  */        function add32(a, b) {    return (a + b) & 0xFFFFFFFF;    }        if (md5('hello') != '5d41402abc4b2a76b9719d911017c592') {    function add32(x, y) {    var lsw = (x & 0xFFFF) + (y & 0xFFFF),    msw = (x >> 16) + (y >> 16) + (lsw >> 16);    return (msw << 16) | (lsw & 0xFFFF);    }    }  };</script>``

## Test runner

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Testing in unknown unknown
Test Ops/sec
bichlmeier
``digest = sha256_digest(input);``
pending…
webtoolkit
``digest = SHA256(input);``
pending…
Weber
``digest = jQuery.sha256(input);``
pending…
crypto-js
``digest = Crypto.SHA256(input);``
pending…
Poettering
``digest = SHA256_hash(input);``
pending…
md5
``digest = md5(input);``
pending…

## Revisions

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