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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
Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=563223" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.0.0 Safari/537.36
Browser:
Chrome 129
Operating system:
Linux
Device Platform:
Desktop
Date tested:
one year ago
Not empty [0]
23.9M/s
Empty [0]
23.4M/s
Not empty lodash.head()
8.7M/s
[0] with check
8.7M/s
Empty lodash.head()
8.5M/s
[0] with null check
6.7M/s
View exact numbers
Test name
Executions per second
✓
Not empty [0]
23,863,384 Ops/sec
Empty [0]
23,419,728 Ops/sec
Not empty lodash.head()
8,748,339 Ops/sec
[0] with check
8,659,984 Ops/sec
Empty lodash.head()
8,538,670 Ops/sec
[0] with null check
6,655,475 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