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YSlow: A new extension for Firebug (on Firefox)

dan39dan39 New
edited July 2007 in Vanilla 1.0 Help
Yahoo just released a new extension for the Firebug Add-on (for Firefox browsers). It grades your site against the Yahoo Performance Optimization guidelines and is surpringly useful at pinpointing configuration problems on your site. (In other words, it tells you why it's slow). I highly recommend it.


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    Cool. I'm trying it out now as we speak on my pages.
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    dan39dan39 New
    edited July 2007
    The add-on is a little harsh on some things like giving an F for "Configure ETags" whenever it finds them. The truth is that ETags are perfectly fine as long as they are configured properly. But, the add-on doesn't actually check whether or not they are configured properly, it just keeps giving an F whenever it sees an ETag. And it doesn't always detect "Use a CDN" properly, never mind that most sites don't even need one (but nonetheless it gives you an F). Aside from those shortcomings, it's a quick way to check your gzip and your http connections and cache comparisons. On the other hand, it does give Google search results pages a straight A. So, it's probably worth listening to for larger sites.
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    This extension fails, gave my old IPB site a better grade then my Vanilla forum.... o_O
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    Most performance listed in Yslow are related to server settings (GZIP compression, header expirations...)
    + Vanilla use to many css and js files.
This discussion has been closed.