Testing in Chrome 31.0.1650.63 32-bit on Windows Server 2008 R2 / 7 64-bit
| Test | Ops/sec |
|---|
|
Object.defineProperty
|
for (var i = 0; i < 1000; i++) {
obj = {};
Object.defineProperty(obj, "x", {
get: funct['get'],
set: funct['set']
})
obj.x = i;
acc += obj.x;
}
|
ready |
|---|
|
__defineGetter__
|
for (var i = 0; i < 1000; i++) {
obj = {};
obj.__defineGetter__('x', funct['get']);
obj.__defineSetter__('x', funct['set']);
obj.x = i;
acc += obj.x;
}
|
ready |
|---|
|
Normal
|
for (var i = 0; i < 1000; i++) {
obj = {};
obj._x = i;
acc += obj._x;
}
|
ready |
|---|
|
Prototype
|
for (var i = 0; i < 1000; i++) {
obj = {};
obj.prototype = {
get x() {
return this._x;
}, set x(value) {
this_x = value;
}
}
obj.x = i;
acc += obj.x;
}
|
ready |
|---|
|
Setter
|
for (var i = 0; i < 1000; i++) {
obj = {};
obj.setX = function(value) {
this._x = value;
}
obj.setX(i);
acc += obj._x;
}
|
ready |
|---|
|
defineProperty with local funcs
|
for (var i = 0; i < 1000; i++) {
obj = {};
Object.defineProperty(obj, "x", {
get: function() { return this._x; },
set: function(v) { this._x = v; },
configurable: true
})
obj.x = i;
acc += obj.x;
}
|
ready |
|---|
http://jsperf.com/object-defineproperty-vs-definegetter-vs-normal/49