parseInt() vs everything (v3)

Revision 3 of this benchmark created by fengmk2 on

Description

Casting string to integer, for example after reading from localStorage.

Setup

var strings = [];
    var numbers = [];
    for (var i = 0; i < 10000; ++i) {
      strings.push("" + i);
      numbers.push(0);
    }
    
    strings.push("");
    numbers.push(0);
    strings.push("abc");
    numbers.push(0);

Test runner

Ready to run.

Testing in
TestOps/sec
parseInt with base
var i = strings.length;
while (--i >= 0) {
  numbers[i] = parseInt(strings[i], 10);
}
ready
+
var i = strings.length;
while (--i >= 0) {
  numbers[i] = +strings[i];
}
ready
~~
var i = strings.length;
while (--i >= 0) {
  numbers[i] = ~~strings[i];
}
ready
| 0
var i = strings.length;
while (--i >= 0) {
  numbers[i] = strings[i] | 0;
}
ready
>> 0
var i = strings.length;
while (--i >= 0) {
  numbers[i] = strings[i] >> 0;
}
ready
>>> 0
var i = strings.length;
while (--i >= 0) {
  numbers[i] = strings[i] >>> 0;
}
ready
Number()
var i = strings.length;
while (--i >= 0) {
  numbers[i] = Number(strings[i]);
}
ready
* 1
var i = strings.length;
while (--i >= 0) {
  numbers[i] = strings[i] * 1;
}
ready
Math.floor()
var i = strings.length;
while (--i >= 0) {
  numbers[i] = Math.floor(strings[i]);
}
ready
- 0
var i = strings.length;
while (--i >= 0) {
  numbers[i] = strings[i] - 0;
}
ready
~
var i = strings.length;
while (--i >= 0) {
  numbers[i] = ~strings[i];
}
ready
parseInt no base
var i = strings.length;
while (--i >= 0) {
  numbers[i] = parseInt(strings[i]);
}
ready

Revisions

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