Array Performance (v147)

Revision 147 of this benchmark created by Julian Alberto on

Description

Manual array lookups vs. holey arrays.

Setup

var a1 = [
              {id: 12958, name: 'name1'},
              {id: 29938, name: 'name1'},
              {id: 32994, name: 'name1'},
              {id: 56938, name: 'name1'},
              {id: 65938, name: 'name1'},
];

    var a2 = [];
    a2[12958] = {id: 12958, name: 'name1'};
    a2[29938] = {id: 29938, name: 'name1'};
    a2[32994] = {id: 32994, name: 'name1'};
    a2[56938] = {id: 56938, name: 'name1'};
    a2[65938] = {id: 65938, name: 'name1'};   

    var o = {};
    o['12958'] = {id: 12958, name: 'name1'};
    o['29938'] = {id: 29938, name: 'name1'};
    o['32994'] = {id: 32994, name: 'name1'};
    o['56938'] = {id: 56938, name: 'name1'};
    o['65938'] = {id: 65938, 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] 
    break;
  }
}
 
ready
Holey Array by Index
var id = 29938;
var result = a2[id];
ready
Object by Key
var id = '29938';
var result = o[id];
 
ready

Revisions

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