<div id="test"></div><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" /><input data-form="checkbox" />function knownfunction() { var $this = $(this); $this.val('b'); }$('[data-form="checkbox"]').each(function() { var $this = $(this); $this.val('a'); });$('[data-form="checkbox"]').each(knownfunction);--enable-precise-memory-info flag.
| Test case name | Result |
|---|---|
| Anonymous | |
| Declared |
| Test name | Executions per second |
|---|---|
| Anonymous | 8625.5 Ops/sec |
| Declared | 8730.5 Ops/sec |
Let's break down the benchmark and explain what's being tested.
Overview
The benchmark compares the performance of two approaches to execute an event handler for jQuery's each() method with a checkbox input field.
Approaches compared
each() method.knownfunction) as the callback for the each() method.Library and purpose
The benchmark relies on jQuery, which is a popular JavaScript library used for DOM manipulation and event handling. In this case, jQuery provides the each() method to iterate over elements that match a specified selector (in this case, data-form="checkbox").
Test cases
There are two test cases:
each() method.knownfunction) as the callback for the each() method.Pros and cons of each approach
Other considerations
each() method, which is optimized for performance.Alternatives
If you were to write a similar benchmark, you could consider comparing other JavaScript frameworks or libraries that provide event handling and DOM manipulation capabilities. For example:
However, keep in mind that these alternatives would likely have different performance characteristics and optimizations compared to jQuery.
In summary, the benchmark compares the performance of using an anonymous function versus a declared function as the callback for jQuery's each() method with a checkbox input field. The results can help developers understand the trade-offs between readability, maintainability, and performance when writing JavaScript code.
