Run results for: Performance difference between Object.defineProperty() and Object.defineProperties()

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:140.0) Gecko/20100101 Firefox/140.0

Browser: Firefox 140

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

Object.defineProperty()

99K/s

Object.defineProperties()

49K/s

View exact numbers

Test name	Executions per second
✓ Object.defineProperty()	98,806 Ops/sec
Object.defineProperties()	48,613 Ops/sec

HTML Preparation code:

<!--your preparation HTML code goes here-->

Script Preparation code:

var testProps = {}
for(let i = 1; i < 100; i++){
  if(i%2){
    testProps[`aa${i}`] = {
      value: i,
      writable: true,
      enumerable: false,
      configurable: false
    }
  } else {
    testProps[`aa${i}`] = {
      get(){
        return this[`bb${i}`]
      },
      set(nv){
        this[`bb${i}`] = 2 * nv + 3;
        return true;
      },
      enumerable: false,
      configurable: false
    }
  }
}

Tests:

Object.defineProperty()
const testObj = {}, testProps_ = {...testProps}; for(let a in testProps_){ Object.defineProperty(testObj, a, testProps_[a]); }
Object.defineProperties()
const testObj = {}, testProps_ = {...testProps}; Object.defineProperties(testObj, testProps_)