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performance js elements selector
(version: 0)
Comparing performance of:
querySelector vs getElementsByClassName
Created:
4 years ago
by:
Guest
Jump to the latest result
HTML Preparation code:
<div class="test"></div><div class="test"></div><div class="test"></div><div class="test"></div><div class="test"></div><div class="test"></div><div class="test"></div><div class="test"></div><div class="test"></div><div class="test"></div><div class="test"></div><div class="test"></div><div class="test"></div><div class="test"></div><div class="test"></div><div class="test"></div><div class="test"></div><div class="test"></div><div class="test"></div><div class="test"></div><div class="test"></div><div class="test"></div><div class="test"></div><div class="test"></div><div class="test"></div><div class="test"></div><div class="test"></div><div class="test"></div><div class="test"></div><div class="test"></div><div class="test"></div><div class="test"></div><div class="test"></div><div class="test"></div><div class="test"></div><div class="test"></div><div class="test"></div><div class="test"></div><div class="test"></div><div class="test"></div><div class="test"></div><div 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Tests:
querySelector
document.querySelector(".test")
getElementsByClassName
document.getElementsByClassName(".test")
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
Fork
Test case name
Result
querySelector
getElementsByClassName
Fastest:
N/A
Slowest:
N/A
Latest run results:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Based on the provided benchmark results, it appears that there is a significant difference in execution speed between `getElementsByClassName` and `querySelector`. **Answer:** The querySelector function outperforms the getElementsByClassName function by approximately 22% (5091182.5 / 4182624.5 ≈ 1.21) when executed on a Chrome 96 browser on Windows desktop devices. Note: The execution speed difference may not be significant for all use cases, but it is notable in this specific scenario where the HTML structure contains multiple elements with the class "test".
Related benchmarks:
Jquery fastest selector
querySelectorAll vs getElementsByClassName x2
querySelector vs querySelectorAll simple (single element result)
JS selector functions
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