Truncating decimals

JavaScript performance comparison

Test case created by Robert Koritnik

Info

Different techniques of decimal number truncation. Tests work on positives as well as negatives.

Preparation code

 
<script>
Benchmark.prototype.setup = function() {
    var n = 0;
};
</script>

Test runner

Warning! For accurate results, please disable Firebug before running the tests. (Why?)

Java applet disabled.

Testing in unknown unknown
Test Ops/sec
Bitwise OR
n = Math.random() * 1000 - 500;
return n | 0;
pending…
Bitwise NOT
n = Math.random() * 1000 - 500;
return ~~n;
pending…
Math operations
n = Math.random() * 1000 - 500;
return n < 0 && Math.ceil(n) || Math.floor(n);
pending…
parseInt
n = Math.random() * 1000 - 500;
return parseInt(n);
pending…

Compare results of other browsers

Revisions

You can edit these tests or add even more tests to this page by appending /edit to the URL. Here’s a list of current revisions for this page:

0 comments

Add a comment