Yahoo’s YSlow Page Speed Tool Now Available for Chrome

Every web developer wants to speed up their site, and Yahoo’s YSlow plugin for Firefox is a great way to find out what’s slowing your pages down. Now, Yahoo has announced YSlow for Chrome, which brings all the goodness of YSlow to Google’s popular web browser.

In Firefox YSlow requires (and builds on) the Firebug plugin, but the Chrome version stands on its own. You can grab the new beta version of YSlow for Chrome from the Google Chrome Extension website (note that you’ll need to be using Chrome 10 or better).

Once installed, YSlow for Chrome works just like the Firefox version, with one nice difference — instead of being added to the bottom of the webpage as a kind of frame, YSlow for Chrome floats in its own window, which makes it easier to compare YSlow data from multiple websites.

The Yahoo developer blog notes that the current version of Chrome does not provide extensions access to its network panel. That means that YSlow for Chrome uses Ajax calls to cull its data and provide speed reports. As a result it’s possible that some rules might be affected and differ slightly from what the Firefox version reports. I tested a handful of domains in both Chromium and Firefox and didn’t notice any differences between the two, but be aware that it’s possible there might be some discrepancies.

For more information on how to use YSlow to speed up your websites, see our post, How to Speed Up Your Site With YSlow and Page Speed. Sadly, there’s still no Page Speed add-on for Chrome; Google’s Speed Tracer extension covers similar ground, but you’ll need to jump through some hoops to get it working.

Given Chrome’s already awesome built-in developer tools — which do more or less everything Firebug can do, no extensions necessary — adding YSlow to the mix puts Chrome on par with Firefox when it comes to the best browser for building and debugging your websites.

Illustration from “Physics for Entertainment” by Yakov Isidorovich Perelman from Archive.org

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