Prefix or Postfix increment? (v6)

Revision 6 of this benchmark created by imaya on

Description

So with recent JS runtimes, does using the prefix increment/decrement operators squeeze the usual performance droplet from loop index maintenance?

Setup

var data = new Array(500 * 1000);
    var index = data.length - 1;
    while (index--) data[index] = index;

Test runner

Ready to run.

Testing in
TestOps/sec
Prefix
for (var index = 0, len = data.length; index < len; ++index) {
  data[index] = data[index] * 2;
}
ready
Suffix
for (var index = 0, len = data.length; index < len; index++) {
  data[index] = data[index] * 2;
}
ready

Revisions

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