jsPerf.app is an online JavaScript performance benchmark test runner & jsperf.com mirror. It is a complete rewrite in homage to the once excellent jsperf.com now with hopefully a more modern & maintainable codebase.
jsperf.com URLs are mirrored at the same path, e.g:
https://jsperf.com/negative-modulo/2
Can be accessed at:
https://jsperf.app/negative-modulo/2
var cp1251 ='\u0000\u0001\u0002\u0003\u0004\u0005\u0006\u0007\u0008\u0009\u000A\u000B\u000C\u000D\u000E\u000F\u0010\u0011\u0012\u0013\u0014\u0015\u0016\u0017\u0018\u0019\u001A\u001B\u001C\u001D\u001E\u001F\u0020\u0021\u0022\u0023\u0024\u0025\u0026\u0027\u0028\u0029\u002A\u002B\u002C\u002D\u002E\u002F\u0030\u0031\u0032\u0033\u0034\u0035\u0036\u0037\u0038\u0039\u003A\u003B\u003C\u003D\u003E\u003F\u0040\u0041\u0042\u0043\u0044\u0045\u0046\u0047\u0048\u0049\u004A\u004B\u004C\u004D\u004E\u004F\u0050\u0051\u0052\u0053\u0054\u0055\u0056\u0057\u0058\u0059\u005A\u005B\u005C\u005D\u005E\u005F\u0060\u0061\u0062\u0063\u0064\u0065\u0066\u0067\u0068\u0069\u006A\u006B\u006C\u006D\u006E\u006F\u0070\u0071\u0072\u0073\u0074\u0075\u0076\u0077\u0078\u0079\u007A\u007B\u007C\u007D\u007E\u007F\u0402\u0403\u201A\u0453\u201E\u2026\u2020\u2021\u20AC\u2030\u0409\u2039\u040A\u040C\u040B\u040F\u0452\u2018\u2019\u201C\u201D\u2022\u2013\u2014\u2122\u0459\u203A\u045A\u045C\u045B\u045F\u00A0\u040E\u045E\u0408\u00A4\u0490\u00A6\u00A7\u0401\u00A9\u0404\u00AB\u00AC\u00AD\u00AE\u0407\u00B0\u00B1\u0406\u0456\u0491\u00B5\u00B6\u00B7\u0451\u2116\u0454\u00BB\u0458\u0405\u0455\u0457\u0410\u0411\u0412\u0413\u0414\u0415\u0416\u0417\u0418\u0419\u041A\u041B\u041C\u041D\u041E\u041F\u0420\u0421\u0422\u0423\u0424\u0425\u0426\u0427\u0428\u0429\u042A\u042B\u042C\u042D\u042E\u042F\u0430\u0431\u0432\u0433\u0434\u0435\u0436\u0437\u0438\u0439\u043A\u043B\u043C\u043D\u043E\u043F\u0440\u0441\u0442\u0443\u0444\u0445\u0446\u0447\u0448\u0449\u044A\u044B\u044C\u044D\u044E\u044F';
function test1(str) {
for (var i = 0, l = str.length, result = ''; i < l; i++) {
result += String.fromCharCode(str.charCodeAt(i));
}
return result;
}
function test2(str) {
for (var i = 0, l = str.length, result = ''; i < l; i++) {
result += str.charAt(i);
}
return result;
}
function test3(str) {
for (var i = 0, l = str.length, result = ''; i < l; i++) {
result += str[i];
}
return result;
}
var str2rstr_utf8_1dec = function(input) {
var output = "";
for (var i = 0; i < input.length; i++) {
var c = input.charCodeAt(i);
if (c < 128) {
output += input.charAt(i);
} else if ((c > 127) && (c < 2048)) {
output += String.fromCharCode((c >> 6) | 192);
output += String.fromCharCode((c & 63) | 128);
} else {
output += String.fromCharCode((c >> 12) | 224);
output += String.fromCharCode(((c >> 6) & 63) | 128);
output += String.fromCharCode((c & 63) | 128);
}
}
return output;
};
var str2rstr_utf8_2dec = function(input) {
var output = "";
for (var i = 0; i < input.length; i++) {
var c = input.charCodeAt(i);
if (c < 128) {
output += input.charAt(i);
} else if ((c > 127) && (c < 2048)) {
output += String.fromCharCode(192 | (c >> 6));
output += String.fromCharCode(128 | (c & 63));
} else {
output += String.fromCharCode(224 | (c >> 12));
output += String.fromCharCode(128 | ((c >> 6) & 63));
output += String.fromCharCode(128 | (c & 63));
}
}
return output;
};
Ready to run.
Test | Ops/sec | |
---|---|---|
String.fromCharCode + str.charCodeAt |
| ready |
str.charAt + str.charCodeAt |
| ready |
str[i] + charCodeAt |
| ready |
1dec |
| ready |
2dec |
| ready |
You can edit these tests or add more tests to this page by appending /edit to the URL.