Benchmark: FIND SINGLE ELEMENT: querySelector(ID, TagName e Class) vs getElementsByClassName vs getElementsByID vs getElementsByTagName — (getElementsByClassName sem .(ponto)) - MeasureThat.net

FIND SINGLE ELEMENT: querySelector(ID, TagName e Class) vs getElementsByClassName vs getElementsByID vs getElementsByTagName — (getElementsByClassName sem .(ponto)) (version: 2)

Comparing performance of: querySelector (Class) vs getElementsByClassName vs querySelector (ID) vs getElementsByID vs getElementsByTagName vs querySelector (TagName)

Created: 4 years ago by: Registered User

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HTML Preparation code:

<div class="test" id="test"></div>

Tests:

querySelector (Class)
document.querySelector(".test")
getElementsByClassName
document.getElementsByClassName("test")[0]
querySelector (ID)
document.querySelector("#test")
getElementsByID
document.getElementById("test")
getElementsByTagName
document.getElementsByTagName("div")[0]
querySelector (TagName)
document.querySelector("div")

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
querySelector (Class)
getElementsByClassName
querySelector (ID)
getElementsByID
getElementsByTagName
querySelector (TagName)

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/84.0.4147.125 Safari/537.36

Browser/OS: Chrome 84 on Windows

View result in a separate tab

Test name	Executions per second
querySelector (Class)	3322791.0 Ops/sec
getElementsByClassName	2567780.0 Ops/sec
querySelector (ID)	2381021.0 Ops/sec
getElementsByID	2925576.0 Ops/sec
getElementsByTagName	2450925.0 Ops/sec
querySelector (TagName)	2475596.0 Ops/sec