Run results for: for-of vs forEach

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.88 Safari/537.36

Browser: Chrome 100

Operating system: Linux

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
native for-of w/ entries	1880.2 Ops/sec
native forEach w/ entries	1641.1 Ops/sec
vanilla for-loop w/ Object.keys	1041.0 Ops/sec
vanilla for-loop w/ Object.entries	1990.3 Ops/sec
vanilla for-loop w/ Object.values (no keys)	24947.7 Ops/sec
native forEach w/ Object.values (no keys)	17622.5 Ops/sec
native for-in	500.4 Ops/sec

Script Preparation code:

var obj = Array.from({ length: 10000 }).map((value, i) => i).reduce((val, v) => { val[v] = v; return val; }, {})

Tests:

native for-of w/ entries
for (const [k, v] of Object.entries(obj)) {}
native forEach w/ entries
Object.entries(obj).forEach(function(v, k) {})
vanilla for-loop w/ Object.keys
const keys = Object.keys(obj); for (let i = 0; i < keys.length; i++) { const v = obj[keys[i]]; }
vanilla for-loop w/ Object.entries
const entries = Object.entries(obj); for (let i = 0; i < entries.length; i++) { }
vanilla for-loop w/ Object.values (no keys)
const values = Object.values(obj); for (let i = 0; i < values.length; i++){ }
native forEach w/ Object.values (no keys)
Object.values(obj).forEach(function(v) {})
native for-in
for (const prop in obj) { if (obj.hasOwnProperty(prop)) { const v = obj[prop]; } }