<script src='https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js'></script><script> var $jq183 = $.noConflict(true);</script><script src='https://ajax.googleapis.com/ajax/libs/jquery/2.0.3/jquery.min.js'></script><script> var $jq203 = $.noConflict(true);</script><div> <ul id="menu"> <li class="menu-item">1</li> <li class="menu-item">2</li> <li class="menu-item">3</li> <li class="menu-item">4</li> </ul></div>function tests($) { $(".menu-item").eq(2).closest("ul").css({ "background-color": "red" }).parent().css({ "border": "1px solid blue" }).append($("<p></p>").text("Text.").css({ "background-color": "green" })).end().end().remove(); console.log('tests' + $);}tests($jq183);tests($jq203);--enable-precise-memory-info flag.
| Test case name | Result |
|---|---|
| Test jQuery 1.8.3 | |
| Test jQuery 2.0.3 |
| Test name | Executions per second |
|---|---|
| Test jQuery 1.8.3 | 127522.0 Ops/sec |
| Test jQuery 2.0.3 | 130626.0 Ops/sec |
I'll break down the provided benchmark definition, individual test cases, and latest benchmark results in detail.
Benchmark Definition
The provided JSON represents a JavaScript microbenchmark that compares the performance of two versions of jQuery: 1.8.3 and 2.0.3. The benchmark is defined by the "Script Preparation Code" which creates a test function tests($). This function is called with a jQuery object $ as an argument.
Options Compared
The benchmark compares two options:
$.noConflict(true) method to ensure that each browser uses a different instance of jQuery.Pros and Cons of Different Approaches
Using multiple browser modes (e.g., Chrome, Safari) can lead to more accurate results by eliminating browser-specific issues. However, this approach also increases the complexity and time required for benchmarking.
On the other hand, using only one browser mode might simplify the benchmarking process but may introduce browser-specific biases.
Library
The $.noConflict(true) method is a jQuery utility function that allows multiple versions of jQuery to coexist on the same page. It returns a new version of jQuery and ensures that no conflicts occur between different versions.
Special JS Feature/Syntax
There are no special JavaScript features or syntaxes used in this benchmark.
Benchmark Preparation Code
The provided HTML preparation code sets up two instances of jQuery: $.noConflict(true) for each version. The script tags load the corresponding jQuery libraries, and the test function is defined using an immediately invoked function expression (IIFE).
Individual Test Cases
There are only two individual test cases:
tests($jq183) function with the first instance of jQuery ($jq183).tests($jq203) function with the second instance of jQuery ($jq203).Latest Benchmark Results
The latest benchmark results show the performance of each test case across multiple executions per second:
Other Alternatives
There are several other alternatives for benchmarking JavaScript:
Keep in mind that each alternative has its own strengths and weaknesses, and the choice of which one to use depends on the specific requirements of your project or benchmark.
