new Array vs Literal vs Literal with Length (v3)

Revision 3 of this benchmark created by JT on

Description

Testing which is faster for a large array of pre-defined length.

Preparation HTML

<script>
  var length = 10000;
</script>

Test runner

Ready to run.

Testing in
TestOps/sec
new Array()
var a = new Array(length);

for (var i = length; i--;) {
  a[i] = 0;
}
ready
Literal
var a = [];

for (var i = length; i--;) {
  a[i] = 0;
}
ready
Literal with length
var a = [];

a.length = length;

for (var i = length; i--;) {
  a[i] = 0;
}
ready
Literal (forwards)
var a = [];

for (var i = 0; i < length; i++) {
  a[i] = 0;
}
ready
Literal with length (forward)
var a = [];

a.length = length;

for (var i = 0; i < length; i++) {
  a[i] = 0;
}
ready
Push
var a = []

for (var i = length; i--;) {
  a.push(0);
}
ready

Revisions

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