65 lines
1.6 KiB
JavaScript
65 lines
1.6 KiB
JavaScript
function sheetjs1(bstr) {
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var a = 1, b = 0, L = bstr.length;
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for(var i = 0; i < L;) {
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a += bstr.charCodeAt(i++);
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a %= 65521;
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b += a;
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b %= 65521;
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}
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return (b << 16) | a;
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}
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function sheetjs2(bstr) {
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var a = 1, b = 0, L = bstr.length, M;
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for(var i = 0; i < L;) {
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M = Math.min(L-i, 3850)+i;
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for(;i<M;i++) {
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a += bstr.charCodeAt(i);
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b += a;
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}
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a = (15*(a>>>16)+(a&65535))
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b = (15*(b>>>16)+(b&65535))
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}
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return ((b%65521) << 16) | (a%65521);
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}
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function sheetjs3(bstr) {
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var a = 1, b = 0, L = bstr.length, M;
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for(var i = 0; i < L;) {
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M = Math.min(L-i, 5552);
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for(;M>0;--M) {
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a += bstr.charCodeAt(i++);
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b += a;
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}
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a %= 65521;
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b %= 65521;
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}
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return (b << 16) | a;
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}
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var foobar = [255,255,255,255,255,255].map(function(x) { return String.fromCharCode(x); }).join("");
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foobar += foobar;
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foobar += foobar;
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foobar += foobar;
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foobar += foobar;
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foobar += foobar;
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foobar += foobar;
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foobar.charCodeAt(0);
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var m = 2048;
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var assert = require('assert');
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var BM = require('./bm');
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for(var i = 0; i != 14; ++i) {
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foobar += foobar;
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foobar.charCodeAt(0);
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assert.equal(sheetjs1(foobar), sheetjs3(foobar));
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assert.equal(sheetjs1(foobar), sheetjs2(foobar));
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//for(var j = 0; j != 200; ++j) assert.equal(sheetjs2(foobar), sheetjs3(foobar));
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var suite = new BM('binary string (' + foobar.length + ')');
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if(i<3) suite.add('sheetjs 1', function() { for(var j = 0; j != m; ++j) sheetjs1(foobar); });
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suite.add('sheetjs 2', function() { for(var j = 0; j != m; ++j) sheetjs2(foobar); });
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suite.add('sheetjs 3', function() { for(var j = 0; j != m; ++j) sheetjs3(foobar); });
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suite.run();
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m>>>=1; if(m < 10) m = 10;
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}
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