preallocating Array

JavaScript performance comparison

Revision 15 of this test case created by sutekidayo

Preparation code

<script>
  var N = 10000;

 
</script>
    

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
a=[]; a.push(value);
var a = [];
for (var i = 0; i < N; ++i) {
  a.push(0);
}
pending…
a=new Array(N); a.length=0; a.push(value);
var a = new Array(N);
a.length = 0;
for (var i = 0; i < N; i++) {
  a.push(0);
}
pending…
a=new Array(N); a[i]=value;
var a = new Array(N);
for (var i = 0; i < N; i++) {
  a[i] = 0;
}
pending…
a = []; a[i]=value;
var a = [];
for (var i = 0; i < N; i++) {
  a[i] = 0;
}
pending…
a=[]; a.length = N; a[i]=value;
var a = [];
a.length = N;
for (var i = 0; i < N; i++) {
  a[i] = 0;
}
pending…

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