Run results for: Fast Array lookup

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.116 Safari/537.36

Browser: Chrome 53

Operating system: Windows

Device Platform: Other

Date tested: 8 years ago

Test name	Executions per second
lookupFloat32	5472762.0 Ops/sec
lookupDoubleArr	5629765.0 Ops/sec
lookupDoubleArrWithObject	5685163.0 Ops/sec

Script Preparation code:

var f32arr = new Float32Array(1000000);
f32arr.forEach(function (a) {
  a = 123456;
});

var doublearr = [];

for (var i = 0; i < 1000; i++) {
 doublearr[i] = [];
 for (var j = 0; j < 1000; j++) {
   doublearr[i].push(123456);
 }
}

var doublearrwithobject = [];

for (var i = 0; i < 1000; i++) {
 doublearrwithobject[i] = [];
 for (var j = 0; j < 1000; j++) {
   doublearrwithobject[i].push({ value: 123456 });
 }
}

function lookupFloat32 () {
  var x = f32arr[722500];
}

function lookupDoubleArr () {
  var y = doublearr[850][850];
}

function lookupDoubleArrWithObject () {
  var z = doublearrwithobject[850][850].value;
}

Tests:

lookupFloat32
lookupFloat32();
lookupDoubleArr
lookupDoubleArr();
lookupDoubleArrWithObject
lookupDoubleArrWithObject();