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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=529837" 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/125.0.0.0 Safari/537.36
Browser:
Chrome 125
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
2 years ago
Empty [0]
26.6M/s
Not empty [0]
26.2M/s
[0] with check
10.2M/s
Empty lodash.head()
9.8M/s
Not empty lodash.head()
9.7M/s
[0] with null check
7.6M/s
View exact numbers
Test name
Executions per second
✓
Empty [0]
26,550,952 Ops/sec
Not empty [0]
26,170,896 Ops/sec
[0] with check
10,185,620 Ops/sec
Empty lodash.head()
9,825,416 Ops/sec
Not empty lodash.head()
9,733,877 Ops/sec
[0] with null check
7,590,246 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