push allocated vs dynamic (v49)

Revision 49 of this benchmark created by Benoit VALLON on

Description

is it usefull to pre-allocate the array by setting the last value first when assigning some values ?

Setup

var n=1000000;

Test runner

Ready to run.

Testing in
TestOps/sec
push
var myArray = [];
for (var i = 0; i < n; i++) {
  myArray.push(i)
}
ready
reverse writing
var myArray = [];
var i = n;
while (i--) {
  myArray[i] = i;
}  
ready
reverse writing, array allocated with Array constructor
var myArray = new Array(n);
var i = n;
while (i--) {
  myArray[i] = i;
}  
ready
array allocated with Array constructor
var myArray = new Array(n);
var i = 0;
while (i < n) {
  myArray[i] = i;
  i++;
}  
ready

Revisions

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