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Checking performance of Array.reverse() vs a quick while loop.
<script>
var ar = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
var backwardI = len - 1;
var forwardI = 0;
var len = ar.length;
var reverse = function(arr) {
var result = [],
ii = arr.length;
for (var i = ii - 1; i !== 0; i--) {
result.push(arr[i]);
}
return result;
}
var inlinereverse = function(ar) {
var len = ar.length,
forwardI = 0;
while (forwardI < len) {
var end = (len - 1) - forwardI;
ar.push(ar[end]);
ar.splice(end, 1);
forwardI++;
}
}
</script>
Ready to run.
Test | Ops/sec | |
---|---|---|
Array.reverse() |
| ready |
Backward while loop |
| ready |
Forward while loop |
| ready |
reverse func |
| ready |
inline forward while loop |
| ready |
inline new array loop |
| ready |
You can edit these tests or add more tests to this page by appending /edit to the URL.