Run results for: For in vs For of

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.143 Safari/537.36

Browser: Chrome 53

Operating system: Linux

Device Platform: Other

Date tested: 8 years ago

Test name	Executions per second
for in	10366.3 Ops/sec
for of	9866.3 Ops/sec

Script Preparation code:

var obj = {a: 1, b: 2, c: 3, d: 4}

AخA
 
var obj = {a: 1, b: 2, c: 3, d: 4}

Tests:

for in
for (var x in obj) { console.log(x); }
for (var x in obj) { console.log(x); }
for of
for (var x of Object.keys(obj)) { console.log(x); }
for (var x of Object.keys(obj)) { console.log(x); }