selector api (version: 1)

getElementById, getElementsByClassName, querySelector, querySelectorAll

Comparing performance of: getElementById vs getElementsByClassName vs querySelector(ID) vs querySelector(class) vs querySelectorAll(ID) vs querySelectorAll(class) vs exposed under the window object

Created: 6 months ago by: Guest
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HTML Preparation code:
Tests:
Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results
  • Test case name Result
    getElementById
    getElementsByClassName
    querySelector(ID)
    querySelector(class)
    querySelectorAll(ID)
    querySelectorAll(class)
    exposed under the window object

    Fastest: N/A

    Slowest: N/A

Latest run results:
Run details: (Test run date: 6 months ago)
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/144.0.0.0 Safari/537.36
Chrome 144 on Windows
View result in a separate tab
getElementById
28.0M/s
querySelector(class)
14.5M/s
getElementsByClassName
13.2M/s
exposed under the window object
8.5M/s
querySelector(ID)
7.7M/s
querySelectorAll(class)
6.2M/s
querySelectorAll(ID)
3.7M/s
View exact numbers
Test name Executions per second
✓ getElementById 27,999,842 Ops/sec
querySelector(class) 14,535,020 Ops/sec
getElementsByClassName 13,234,137 Ops/sec
exposed under the window object 8,456,288 Ops/sec
querySelector(ID) 7,728,256 Ops/sec
querySelectorAll(class) 6,166,144 Ops/sec
querySelectorAll(ID) 3,664,718 Ops/sec

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