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querySelector() vs getElementsByTagName()[0]
(version: 1)
Comparing performance of:
querySelector vs getElementsByTagName()[0]
Created:
one year ago
by:
Guest
Go to the latest result
HTML Preparation code:
<div> <span></span> <span></span> <span></span> <span></span> <span></span> <span></span> <span></span> <span></span> <span></span> <span></span> <span></span> </div>
Script Preparation code:
const div = document.getElementsByTagName('div')[0];
Tests:
querySelector
const span = div.querySelector('span');
getElementsByTagName()[0]
const span = div.getElementsByTagName('span')[0];
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
querySelector
getElementsByTagName()[0]
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
one year ago
)
User agent:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/137.0.0.0 Safari/537.36
Browser/OS:
Chrome 137 on Linux
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=610898" width="100%" height="500px"></iframe>
querySelector
15.3M/s
getElementsByTagName()[0]
11.1M/s
View exact numbers
Test name
Executions per second
✓
querySelector
15,289,845 Ops/sec
getElementsByTagName()[0]
11,123,142 Ops/sec
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querySelectorAll vs getElementsByTagName iteration 22
querySelectorAll vs getElementsByTagName iteration v2
document getElementsByTagName vs querySelectorAll
querySelector() vs getElementsByTagName()[0] prerun
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