Push vs length

JavaScript performance comparison

Revision 12 of this test case created

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Array population in javascript - push vs array.length

http://stackoverflow.com/questions/6772757/using-the-push-method-or-length-when-adding-to-array

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Test Ops/sec
length
var b = [];
for (var i = 0; i < 100000; i++) {
  b[b.length] = i;
};
pending…
push
var a = [];
for (var i = 0; i < 100000; i++) {
  a.push(i);
};
pending…
concat
var a = [];
for (var i = 0; i < 100000; i++) {
  a.concat([i]);
};
pending…
cached length
var a = [];
for (var i = 0, len = a.length; i < 100000; i++, len++) {
  a[len] = i;
};
pending…

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