Array Performance 42 (v33)

Revision 33 of this benchmark created on

Description

Manual array lookups vs. holey arrays.

Setup

var a1 = [];
    for (var i = 0; i < 1000; i++){
        a1.push({id: i, name: 'name' + i});
    }

    var a2 = [];
    for (var i = 0; i < 1000; i++){
        a2.push({id: i, name: 'name' + i});
    }

    var o = {};
    for (var i = 0; i < 1000; i++){
        o[i.toString()] = {id: i, name: 'name' + i};
    }

Test runner

Ready to run.

Testing in
TestOps/sec
Manual Array Lookup
var id = 500,
    result;
for (var i = 0; i < a1.length; i++) {
  if (a1[i].id === id){
      result = a1[i];
      break;
  }
}
 
ready
Holey Array by Index
var id = 500;
var result = a2[id];
ready
Object by Key
var id = '500';
var result = o[id];
 
ready

Revisions

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