Array Performance (v129)

Revision 129 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 = '32994';
for (var i = 0; i < a1.length; i++) {
  if (a1[i].id == id) result = a1[i];
}
 
ready
Holey Array by Index
var id = '32994';
var result = a2[id];
ready
Object by Key
var id = '32994';
var result = o[id];
 
ready

Revisions

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