Removing items from array

JavaScript performance comparison

Revision 6 of this test case created

Preparation code

Benchmark.prototype.setup = function() {
    var a = [], i = 0;
    for (; i < 100; i++)
        a[i] = Math.floor(Math.random() * 10);

Test runner

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Testing in unknown unknown
Test Ops/sec
var b = a.slice();
for (var i = b.length; i--;)
    if (b === 5) b.splice(i, 1);
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;
Delete from array
for (var i = b.length; i--;) 
    if (b === 5) delete b[i]

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