Run results for: defineproperty vs direct assignment, accessing

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.166 Safari/537.36 OPR/79.0.4143.66

Browser: Opera 79

Operating system: Linux

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
a	1.5 Ops/sec
b	1.5 Ops/sec

Tests:

a

var target = {};
var key = 'something';

for (var i=0; i<100; i++) {
    Object.defineProperty(target, key+i, {
      value:i
    });
}
for (var j=0; j<100; j++) {
for (var i=0; i<100; i++) {
    console.log(target[key+i]);
}
}

​x
 
var target = {};var key = 'something';​for (var i=0; i<100; i++) {    Object.defineProperty(target, key+i, {      value:i    });}for (var j=0; j<100; j++) {for (var i=0; i<100; i++) {    console.log(target[key+i]);}}

b

var target = {};
var key = 'something';

for (var i=0; i<100; i++) {
    target[key+1] = i;
}
for (var j=0; j<100; j++) {
for (var i=0; i<100; i++) {
    console.log(target[key+i]);
}
}

 
var target = {};var key = 'something';​for (var i=0; i<100; i++) {    target[key+1] = i;}for (var j=0; j<100; j++) {for (var i=0; i<100; i++) {    console.log(target[key+i]);}}