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for-in vs for-of vs object.keys vs object.values to calculate length
(version: 1)
Comparing performance of:
for-in vs Object.keys vs Object.values vs for-of
Created:
5 months ago
by:
Guest
Jump to the latest result
Script Preparation code:
var obj =[...new Array(10)].map(x=>({id:x,name:x}));
Tests:
for-in
let res = 0; for (var key in obj) { res++; } console.log(res);
Object.keys
console.log(Object.keys(obj).length);
Object.values
console.log(Object.values(obj).length);
for-of
let res = 0; for (var value of obj) { res++; } console.log(res);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (4)
Previous results
Fork
Test case name
Result
for-in
Object.keys
Object.values
for-of
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
5 months ago
)
User agent:
Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/140.0.0.0 Mobile Safari/537.36 OPR/92.0.0.0
Browser/OS:
Opera Mobile 92 on Android
View result in a separate tab
Embed
Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=621254" width="100%" height="500px"></iframe>
Test name
Executions per second
for-in
45316.5 Ops/sec
Object.keys
47558.9 Ops/sec
Object.values
48698.2 Ops/sec
for-of
48049.9 Ops/sec
Related benchmarks:
Reading object values in loop: Object.keys vs Object.values
For in vs Object.*.forEach vs Object.values
For in vs Object.*.forEach vs Object.keys
For in vs Object.*.forEach vs Object.values vs for of Object.entries
for-in vs object.keys vs object.values for objects perf
for in / object.keys test
For in vs Object.*.forEach vs Object.values #3
for-in vs object.keys (many keys)
for-in vs object.keys vs object.values to calculate length
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