Run details:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36
Chrome 130
Linux
Desktop
2 months ago
Test name Executions per second
Not empty lodash.head() 10317678.0 Ops/sec
Not empty [0] 25394178.0 Ops/sec
Empty lodash.head() 10110242.0 Ops/sec
Empty [0] 26095262.0 Ops/sec
[0] with check 10602255.0 Ops/sec
[0] with null check 7289917.5 Ops/sec
HTML Preparation code:
x
 
1
2
<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