Array performance

JavaScript performance comparison

Revision 4 of this test case created by Christian Sonne

Test runner

Warning! For accurate results, please disable Firebug before running the tests. (Why?)

Java applet disabled.

Testing in unknown unknown
Test Ops/sec
create array
var i;
for (i=0; i<1024; i++) {
  var arr = new Array(i);
}
pending…
create and fill array forwards
var i,o;
for (i=0; i<1024; i++) {
  var arr = new Array(i);
  for (o=0; o<i; o++) {
    arr[o]=o;
  }
}
pending…
create and fill array backwards
var i,o;
for (i=0; i<1024; i++) {
  var arr = new Array(i);
  for (o=i-1; o>=0; o--) {
    arr[o]=o;
  }
}
pending…
create, fill and pop
var i,o;
for (i=0; i<1024; i++) {
  var arr = new Array(i);
  for (o=0; o<i; o++) {
    arr[o]=o;
  }
  while (arr.length > 0)
    var x = arr.pop();
}
pending…
create, fill and push
var i,o;
for (i=0; i<1024; i++) {
  var arr = new Array(i);
  for (o=0; o<i; o++) {
    arr[o]=o;
  }
  var arr2 = [];
  for (o=0; o<i; o++)
    var x = arr2.push(arr[o]);
}
pending…
create, fill and reverse
var i,o;
for (i=0; i<1024; i++) {
  var arr = new Array(i);
  for (o=0; o<i; o++) {
    arr[o]=o;
  }
  arr.reverse();
  arr.reverse();
  arr.reverse();
  arr.reverse();
  arr.reverse();
}
pending…
create, fill and shift
var i,o;
for (i=0; i<1024; i++) {
  var arr = new Array(i);
  for (o=0; o<i; o++) {
    arr[o]=o;
  }
  while (arr.length > 0)
    var x = arr.shift();
}
pending…
create and fill array forwards alternate
var i,o,arr;
for (i=0; i<1024; i++) {
  arr = new Array(i);
  for (o=0; o<i; o++) {
    arr[o]=o;
  }
}
pending…
create and fill array forwards alternate 2
var i,o,arr=[];
for (i=0; i<1024; i++) {
  var arr2 = new Array(i);
  for (o=0; o<i; o++) {
    arr[o]=o;
  }
}
pending…

Compare results of other browsers

Revisions

You can edit these tests or add even more tests to this page by appending /edit to the URL. Here’s a list of current revisions for this page:

0 comments

Add a comment