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Run results for:
lodash.head() vs [0]
Is head() needed only to check length !== 0 ? P.s. Empty testcase for [0] is useless because it won't crash on trying to get nonexistent element
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=487214" 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/119.0.0.0 Safari/537.36
Browser:
Chrome 119
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
2 years ago
Empty [0]
36.8M/s
Not empty [0]
36.6M/s
[0] with check
13.0M/s
Empty lodash.head()
12.4M/s
Not empty lodash.head()
12.4M/s
[0] with null check
9.6M/s
View exact numbers
Test name
Executions per second
✓
Empty [0]
36,828,084 Ops/sec
Not empty [0]
36,608,524 Ops/sec
[0] with check
13,001,754 Ops/sec
Empty lodash.head()
12,419,569 Ops/sec
Not empty lodash.head()
12,395,578 Ops/sec
[0] with null check
9,644,609 Ops/sec
HTML Preparation code:
<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>
Script Preparation code:
var a = [1,2,3]; var e = [];
Tests:
Not empty lodash.head()
_.head(a)
Not empty [0]
a[0]
Empty lodash.head()
_.head(e)
Empty [0]
e[0]
[0] with check
e.length ? e[0] : undefined
[0] with null check
e && e.length ? e[0] : undefined