var table = require('../').table; function sheetjs1(utf8) { var buf = new Buffer(utf8); for(var crc = -1, i = 0; i != buf.length; ++i) { crc = (crc >>> 8) ^ table[(crc ^ buf[i]) & 0xFF]; } return crc ^ -1; } function sheetjs2(utf8) { for(var crc = -1, i = 0, L=utf8.length, c, d; i < L;) { c = utf8.charCodeAt(i++); if(c < 0x80) { crc = (crc >>> 8) ^ table[(crc ^ c) & 0xFF]; } else if(c < 0x800) { crc = (crc >>> 8) ^ table[(crc ^ (192|((c>>6)&31))) & 0xFF]; crc = (crc >>> 8) ^ table[(crc ^ (128|(c&63))) & 0xFF]; } else if(c >= 0xD800 && c < 0xE000) { c = (c&1023)+64; d = utf8.charCodeAt(i++) & 1023; crc = (crc >>> 8) ^ table[(crc ^ (240|((c>>8)&7))) & 0xFF]; crc = (crc >>> 8) ^ table[(crc ^ (128|((c>>2)&63))) & 0xFF]; crc = (crc >>> 8) ^ table[(crc ^ (128|((d>>6)&15)|(c&3))) & 0xFF]; crc = (crc >>> 8) ^ table[(crc ^ (128|(d&63))) & 0xFF]; } else { crc = (crc >>> 8) ^ table[(crc ^ (224|((c>>12)&15))) & 0xFF]; crc = (crc >>> 8) ^ table[(crc ^ (128|((c>>6)&63))) & 0xFF]; crc = (crc >>> 8) ^ table[(crc ^ (128|(c&63))) & 0xFF]; } } return crc ^ -1; } var BM = require('./bm'); var suite = new BM('unicode string'); var foobar = "foo bar baz٪☃🍣"; foobar += " " + foobar; foobar += " " + foobar; foobar += " " + foobar; foobar += " " + foobar; suite.add('sheetjs 1', function() { for(var j = 0; j != 1000; ++j) sheetjs1(foobar); }); suite.add('sheetjs 2', function() { for(var j = 0; j != 1000; ++j) sheetjs2(foobar); }); suite.run() var assert = require('assert'); assert.equal(sheetjs1(foobar), sheetjs2(foobar));