Run results for: lodash forEach vs for in loop

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 Safari/537.36

Browser: Chrome 138

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

foreach

55.2M/s

for in

20.0M/s

View exact numbers

Test name	Executions per second
✓ foreach	55,161,120 Ops/sec
for in	20,041,340 Ops/sec

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/lodash/4.16.0/lodash.min.js"></script>

Script Preparation code:

var values = [{a: 30310}, {b: 100303}, {c: 3040494}]

Tests:

foreach
var count = 0; _.forEach(values, function(v,i) { if (v.a != null) { count++; } })
for in
var count = 0; for(var value in values) { if (value.a != null) { count++; } }