Run results for: Consume Object.entries vs for..in vs for..in fn 22222

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 14_4_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/15E148 QQ/8.6.5.638 V1_IPH_SQ_8.6.5_1_APP_A Pixel/828 MiniAppEnable SimpleUISwitch/1 StudyMode/0 QQTheme/2921 Core/WKWebView Device/Apple(iPhone 11) NetType/WIFI QBWebViewType/1 WKType/1

Browser: Mobile Safari 14

Operating system: iOS 14.4.2

Device Platform: Mobile

Date tested: 3 years ago

Test name	Executions per second
Object.entries	10.5 Ops/sec
for..in	9.6 Ops/sec
Object.keys	10.1 Ops/sec
Object.keys no entry	11.5 Ops/sec
for..in no array	10.8 Ops/sec
Object.entries no array	11.4 Ops/sec

Script Preparation code:

var obj = {
	a: 1,
    b: 2,
	c: 3,
	d: 4,
	0: 'a',
  	1: 'b',
  	str: 'long string',
	nested: {
    	nested: 0
    },
	hello: 55.5
};

Tests:

Object.entries
for (let i = 0; i < 10000; i++) { for (let entries = Object.entries(obj), i = entries.length - 1; i >= 0; i--) { console.log(entries[i]) } }
for..in
for (let i = 0; i < 10000; i++) { for (let key in obj) { if (obj.hasOwnProperty(key)) { console.log([key, obj[key]]) } } }
Object.keys
for (let i = 0; i < 10000; i++) { for (let keyArray = Object.keys(obj), i = keyArray.length - 1, key = keyArray[i]; i >= 0; key = keyArray[--i]) { console.log([key, obj[key]]); } }
Object.keys no entry
for (let i = 0; i < 10000; i++) { for (let keyArray = Object.keys(obj), i = keyArray.length - 1, key = keyArray[i]; i >= 0; key = keyArray[--i]) { console.log(key, obj[key]); } }
for..in no array
for (let i = 0; i < 10000; i++) { for (let key in obj) { if (obj.hasOwnProperty(key)) { console.log(key, obj[key]) } } }
Object.entries no array
for (let i = 0; i < 10000; i++) { for (let entries = Object.entries(obj), i = entries.length - 1, entry = entries[i]; i >= 0; entry = entries[i--]) { console.log(entry[0], entry[1]) } }

Run results for: Consume Object.entries vs for..in vs for..in fn 22222

Object.entries

for..in

Object.keys

Object.keys no entry

for..in no array

Object.entries no array