Array Performance (v15)

Revision 15 of this benchmark created by Jörg Schaper 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 o1 = {};
    o1['29938'] = {id: 29938, name: 'name1'};
    o1['32994'] = {id: 32994, name: 'name1'};

    var o2 = {};
    o2['29938'] = {id: 29938, name: 'name1'};
    o2['32994'] = {id: 32994, name: 'name1'};

    var o3 = {};
    o3[29938] = {id: 29938, name: 'name1'};
    o3[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 1
var id = '29938';
var result = o1[id];
 
ready
Object by Key 2
//Jörg Schaper
var id = 29938;
var result = o2[id];
 
ready
Object by Key 3
//Jörg Schaper
var id = 29938;
var result = o3[id];
ready

Revisions

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