Removing items from array

JavaScript performance comparison

Revision 2 of this test case created

Preparation code

 
<script>
Benchmark.prototype.setup = function() {
    var a = [], i = 0;
    for (; i < 1000; i++)
        a[i] = Math.floor(Math.random() * 10);
};
</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
Array.splice
var b = a.slice();
for (var i = b.length; i--;)
    if (b === 5) b.splice(i, 1);
pending…
Parsing array
var b = a.slice();
for (var i = 0, j = 0, l = b.length; i < l; i++)
    if (b !== 5) b[j++] = b[i];
b.length = j;
pending…
Delete from array
for (var i = b.length; i--;) 
    if (b === 5) delete b[i]
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