Comparison of performance in rendering icons between FontAwesome version 3 and version 4

The creators of FontAwesome have claimed that the rendering of icons can be up to 30% quicker in version 4. I am curious about the specifics behind this percentage.

  1. Does this speed improvement consistently amount to 30% or are there instances where it is slower?
  2. Is this enhancement applicable across all browsers? Are there any disparities when dealing with mobile devices?
  3. Is the increase in speed primarily due to the transition from using the icon- to fa fa- class names?

In order to investigate these inquiries further, I would like to evaluate the speed at which icons are rendered. I have set up a JSFiddle and possess considerable knowledge of browser developer tools (specifically Chrome), is this the correct method? http://jsfiddle.net/timrpeterson/Q5TA5/2/

Which specific aspect of Chrome developer tools should I focus on? I assume it would be the section where paint speed is measured?

<div>

<link href="http://netdna.bootstrapcdn.com/font-awesome/4.0.3/css/font-awesome.min.css" rel="stylesheet" type="text/css">
    <h3> v4.0.3</h3>
       <i class='fa fa-comment'></i>
       <i class='fa fa-envelope'></i>
</div>
<hr>
<div>
<link href="http://netdna.bootstrapcdn.com/font-awesome/3.2.1/css/font-awesome.min.css" rel="stylesheet" type="text/css">
    <h3> v3.2.1</h3>
 <i class='icon-comment'></i>
 <i class='icon-envelope'></i>
</div>
htmlcssiconsgoogle-chrome-devtoolsfont-awesome

Answer №1

  1. One notable observation is that performance improvements tend to make a greater impact on mobile devices due to their slower processing speed. For instance, reducing 100ms to 50ms and 800ms to 400ms both result in a 50% decrease, but the latter reduction is typically perceived as more significant (especially in terms of absolute numbers). However, this may not apply universally to all aspects, such as Fontawesome or CSS-rendering.

  2. The key factor contributing to the increased speed is likely the shift from using attribute selectors to class selectors. For example, utilizing .icon.icon-name rather than 

    [class^="icon-"], [class*=" icon-"]
    .

Regrettably, I'm unable to address your additional inquiries at this time. Nevertheless, I hope this information proves somewhat helpful.

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