Run results for: Object.defineProperty vs direct assignment

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:137.0) Gecko/20100101 Firefox/137.0

Browser: Firefox 137

Operating system: Linux

Device Platform: Desktop

Date tested: one month ago

Test name	Executions per second
a	12473.7 Ops/sec
b	16879.5 Ops/sec

Tests:

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

for (let i = 0; i < 1000; i++) {
    Object.defineProperty(target, key + i, {value: i});
}

​x
 
let target = {};let key = 'something';​for (let i = 0; i < 1000; i++) {    Object.defineProperty(target, key + i, {value: i});}

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

for (let i = 0; i < 1000; i++) {
    target[key + i] = i;
}

 
let target = {};let key = 'something';​for (let i = 0; i < 1000; i++) {    target[key + i] = i;}