<div>stuff</div><div>stuff</div><div>stuff</div><div>stuff</div><div>stuff</div><div>stuff</div><div>stuff</div><div>stuff</div><div>stuff</div><div>stuff</div><div>stuff</div><div>stuff</div> <div class="div1"><span>stuff</span><span>stuff</span><span>stuff</span><span>stuff</span><span>stuff</span><span>stuff</span><span>stuff</span><span>stuff</span><span>stuff</span><h1>H1</h1><span>stuff</span><span>stuff</span><span>stuff</span><span>stuff</span><span>stuff</span><span>stuff</span><h2>h2</h2></div><div>stuff</div><div>stuff</div><div>stuff</div><div>stuff</div><div>stuff</div><div>stuff</div><div>stuff</div><div>stuff</div><div>stuff</div><div>stuff</div>document.getElementsByClassName("div1")document.querySelector(".div1")$.find('.div1')$('.div1')$(document.getElementsByClassName("div1"))--enable-precise-memory-info flag.
| Test case name | Result |
|---|---|
| getElementsByClassName | |
| querySelector | |
| speed find | |
| selector | |
| j |
| Test name | Executions per second |
|---|---|
| getElementsByClassName | 3637227.2 Ops/sec |
| querySelector | 320583.0 Ops/sec |
| speed find | 1041159.3 Ops/sec |
| selector | 605474.8 Ops/sec |
| j | 344037.2 Ops/sec |
Let's break down the benchmark tests.
Benchmark Overview
The provided JSON represents a set of benchmark tests to compare the performance of different methods for selecting elements on a web page using JavaScript. The tests are designed to measure how quickly each method can execute in various browsers and environments.
Test Cases
There are five test cases:
document.getElementsByClassName() method to select all elements with the class "div1".document.querySelector() method to select the first element with the class "div1".$().find() method to select all elements with the class "div1".$() method to select all elements with the class "div1".document.getElementsByClassName() and jQuery, but it's not entirely clear what this test is trying to measure.Library Usage
The speed find and selector test cases use the jQuery library, which is a popular JavaScript library for DOM manipulation and event handling. In these tests, jQuery is used to select elements on the page using its $() method or .find() method.
Special JS Feature/Syntax
There are no special JavaScript features or syntax being tested in this benchmark.
Options Compared
The test cases compare the performance of different methods for selecting elements on a web page:
document.getElementsByClassName()document.querySelector()$().find()$()Pros/Cons and Considerations
Here are some pros and cons to consider when choosing between these methods:
document.getElementsByClassName() is generally faster than the other methods, especially for large numbers of elements. However, this may not be the case in all browsers or environments.document.getElementsByClassName() has good browser support, while document.querySelector() is also widely supported but may have some quirks in older browsers. jQuery's methods are generally well-supported across most modern browsers.Other Alternatives
Other alternatives for selecting elements on a web page include:
document.querySelectorAll() method (not tested in this benchmark)document.querySelector('.div1'))Keep in mind that the results of this benchmark may not be universally applicable and should be taken as a general guideline rather than an absolute truth. The best approach will depend on your specific use case and requirements.
