Array Performance (v95)

Revision 95 of this benchmark created on

Description

Manual array lookups vs. holey arrays.

Setup

var a1 = [{id: 29938, name: 'name1'}, {id: 32994, name: 'name1'}];

    var a2 = [];
    a2[29938] = {id: 29938, name: 'name1'};
    a2[32994] = {id: 32994, name: 'name1'};

    var o = {};
    o['29938'] = {id: 29938, name: 'name1'};
    o['32994'] = {id: 32994, name: 'name1'};

Test runner

Ready to run.

Testing in
TestOps/sec
Manual Array Lookup
var id = 29938;
for (var i = 0; i < a1.length; i++) {
  if (a1[i].id === id) result = a1[i];
}
 
ready
Holey Array by Index
var id = 29938;
var result = a2[id];
ready
Object by Key
var id = '29938';
var result = o[id];
 
ready
test1
var ary = new Uint8Array(1000);
ready
test2
var ary = new Array(1000).join('0').split('');
ready
test3
var arr = new Array(1000);
for (var i=0; i<arr.length; i++){arr[i] = 0;}
ready
test4
var ary = [].slice.apply(new Uint8Array(new Array(1000)));
ready

Revisions

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