pre-allocated arrays

JavaScript performance comparison

Revision 59 of this test case created by Barfoo

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
empty literal
var arr = [];
for (var i = 0; i < 5; i++) {
    arr[i] = i;
}
pending…
pre-allocated array overflows
var arr = new Array(3);
for (var i = 0; i < 5; i++) {
    arr[i] = i;
}
pending…
pre-allocated array
var arr = new Array(5);
for (var i = 0; i < 5; i++) {
    arr[i] = i;
}
pending…
large literal
var arr = [];
for (var i = 0; i < 500; i++) {
    arr[i] = i;
}
pending…
large pre-allocated overflows
var arr = new Array(300);
for (var i = 0; i < 500; i++) {
    arr[i] = i;
}
pending…
large pre-allocated
var arr = new Array(500);
for (var i = 0; i < 500; i++) {
    arr[i] = i;
}
pending…
literal push
var arr = [];
for (var i = 0; i < 5; i++) {
    arr.push(i);
}
pending…
pre-allocated push
var arr = new Array(5);
for (var i = 0; i < 5; i++) {
    arr.push(i);
}
pending…

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