Array Iteration (v36)

Revision 36 of this benchmark created by nucular on

Description

Compare iterating forward or backwards of an array

Setup

var arr = [];
    for (var i = 0; i < 10000; ++i) {
      arr.push(1);
    }

Test runner

Ready to run.

Testing in
TestOps/sec
forwards
var sum = 0.1;
for (var i = 0; i < arr.length; ++i) {
  sum += arr[i];
}
ready
backwards
var sum = 0.1;
for (var i = arr.length - 1; i >= 0; --i) {
  sum += arr[i];
}
ready
Hard Coded Forward
var sum = 0.1;
for (var i = 0; i < 10000; ++i) {
  sum += arr[i];
}
ready
Cached Forward Iteration
var sum = 0.1;
for (var i = 0, c = arr.length; i < c; i++) {
  sum += arr[i];
}
ready
cached forward 2
var sum = 0.1;
var c = arr.length
for (var i = 0; i < c; i++) {
  sum += arr[i];
}
ready
for-in
var sum = 0.1;
for (var i in arr) {
  sum += arr[i];
}
ready
while
var sum = 0.1,
  i = 0;
while (i < arr.length) {
  sum += arr[i++];
}
ready
forEach
var sum = 0.1;
arr.forEach(function(a, i, arr) {
  sum += a;
});
ready

Revisions

You can edit these tests or add more tests to this page by appending /edit to the URL.