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Run results for:
if undefined or emptyArray.forEach
to check which implementation is faster
Go to the benchmark
Embed
Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=516047" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36
Browser:
Chrome 123
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
2 years ago
Benchmark engine:
Benchmark.js
emptyArray
108.0M/s
undefined Array
16.7M/s
View exact numbers
Test name
Executions per second
✓
emptyArray
107,961,680 Ops/sec
undefined Array
16,681,605 Ops/sec
Tests:
emptyArray
const emptyArray = [] emptyArray.forEach(() => console.log('should not see this'))
undefined Array
const nonExistentArray = undefined if (nonExistentArray) { nonExistentArray.forEach(() => console.log('should not see this')) }