typed arrays
JavaScript performance comparison
Preparation code
<script>
Benchmark.prototype.setup = function() {
function hex(val) {
if (val >>> 0 !== val) { return " "; }
if (val < 0x10) { return "0" + val.toString(16); }
return val.toString(16);
}
function tohex(array) {
var string = "";
for (var i = 0, l = array.length; i < l; i++) {
string += hex(array[i]);
}
return string;
}
function stringToBuffer(string) {
string = unescape(encodeURIComponent(string));
var length = string.length;
var buf = new Uint8Array(length);
for (var i = 0; i < length; i++) {
buf[i] = string.charCodeAt(i);
}
return buf;
};
var sh1 = (function(){
"use strict";
var wordsToHex = function(words) {
var hex = [],
by,
b;
for (b = 0; b < words.length * 32; b += 8){
by = (words[b >>> 5] >>> (24 - b % 32)) & 0xFF;
hex.push((by >>> 4).toString(16));
hex.push((by & 0xF).toString(16));
};
return hex.join('');
};
// input is a Uint8Array bitstream of the data
var sha1 = function(input){
var H = new Uint32Array([0x67452301, 0xefcdab89, 0x98badcfe, 0x10325476, 0xc3d2e1f0]),
m = [],
l = input.length * 8,
w = [];
for (var i = 0, b = 0; i < l/8; i++, b += 8) m[b >>> 5] |= input[i] << (24 - b % 32);
m[l >> 5] |= 0x80 << (24 - l % 32);
m[((l + 64 >>> 9) << 4) + 15] = l;
for (var i = 0; i < m.length; i += 16) {
var a = H[0], b = H[1], c = H[2], d = H[3], e = H[4];
for (var j = 0; j < 80; j++) {
if (j < 16)
w[j] = m[i + j];
else {
var n = w[j - 3] ^ w[j - 8] ^ w[j - 14] ^ w[j - 16];
w[j] = (n << 1) | (n >>> 31);
}
var t = ((H[0] << 5) | (H[0] >>> 27)) + H[4] + (w[j] >>> 0) + (
j < 20 ? (H[1] & H[2] | ~H[1] & H[3]) + 0x5a827999 :
j < 40 ? (H[1] ^ H[2] ^ H[3]) + 0x6ed9eba1 :
j < 60 ? (H[1] & H[2] | H[1] & H[3] | H[2] & H[3]) - 0x70e44324 :
(H[1] ^ H[2] ^ H[3]) - 0x359d3e2a);
H[4] = H[3];
H[3] = H[2];
H[2] = (H[1] << 30) | (H[1] >>> 2);
H[1] = H[0];
H[0] = t;
}
H[0] += a;
H[1] += b;
H[2] += c;
H[3] += d;
H[4] += e;
}
return new Uint32Array(H.buffer);
}
return sha1;
})();
var sh2 = (function(){
"use strict";
var wordsToHex = function(words) {
var hex = [],
by,
b;
for (b = 0; b < words.length * 32; b += 8){
by = (words[b >>> 5] >>> (24 - b % 32)) & 0xFF;
hex.push((by >>> 4).toString(16));
hex.push((by & 0xF).toString(16));
};
return hex.join('');
};
// input is a Uint8Array bitstream of the data
var sha1 = function(input){
var H0 = 0x67452301,
H1 = 0xefcdab89,
H2 = 0x98badcfe,
H3 = 0x10325476,
H4 = 0xc3d2e1f0,
m = [],
l = input.length * 8,
w = [];
for (var i = 0, b = 0; i < l/8; i++, b += 8) m[b >>> 5] |= input[i] << (24 - b % 32);
m[l >> 5] |= 0x80 << (24 - l % 32);
m[((l + 64 >>> 9) << 4) + 15] = l;
for (var i = 0; i < m.length; i += 16) {
var a = H0, b = H1, c = H2, d = H3, e = H4;
for (var j = 0; j < 80; j++) {
if (j < 16)
w[j] = m[i + j];
else {
var n = w[j - 3] ^ w[j - 8] ^ w[j - 14] ^ w[j - 16];
w[j] = (n << 1) | (n >>> 31);
}
var t = ((H0 << 5) | (H0 >>> 27)) + H4 + (w[j] >>> 0) + (
j < 20 ? (H1 & H2 | ~H1 & H3) + 0x5a827999 :
j < 40 ? (H1 ^ H2 ^ H3) + 0x6ed9eba1 :
j < 60 ? (H1 & H2 | H1 & H3 | H2 & H3) - 0x70e44324 :
(H1 ^ H2 ^ H3) - 0x359d3e2a);
H4 = H3;
H3 = H2;
H2 = (H1 << 30) | (H1 >>> 2);
H1 = H0;
H0 = t;
}
H0 += a;
H1 += b;
H2 += c;
H3 += d;
H4 += e;
}
var res = [H0, H1, H2, H3, H4];
return wordsToHex(res);
}
return sha1;
})();
};
</script>
Test runner
Warning! For accurate results, please disable Firebug before running the tests. (Why?)
Java applet disabled.
| Test | Ops/sec | |
|---|---|---|
with typed arrays |
|
pending… |
without |
|
pending… |
You can edit these tests or add even more tests to this page by appending /edit to the URL.
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