Cloning Arrays (v17)

Revision 17 of this benchmark created by kgryte on

Preparation HTML

<script>
  var a = [];
  for (var i = 0; i < 2000; i++) {
   a[i] = i;
  }
</script>

Setup

var c = new Array( a.length );

Test runner

Ready to run.

Testing in
TestOps/sec
Push
var b = [];
for ( var i = 0; i < a.length; i++ ) {
  b.push( a[ i ] );
}
ready
Reuse
for ( var i = 0; i < a.length; i++ ) {
  c[ i ] = a[ i ];
}
ready
Loop
var b = new Array( a.length );
for ( var i = 0; i < a.length; i++ ) {
  b[ i ] = a[ i ];
}
ready
Map
var b = a.map(function(e) {
    return (e);
});
ready
Slice with 0 index
var b = a.slice(0);
ready
Slice
var b = a.slice();
ready
Concat
var b = a.concat();
ready
Concat 2
var b = [].concat(a);
ready

Revisions

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