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It's another step on Google's long road toward achieving maximum speed and efficiency. The company even launched a Site Performance tool as part of its Webmaster Tools suite to help assess site performance statistics and make changes accordingly. Today's blog post recommends a few other tools for evaluating your site's speed as well, including the Firefox Add-on Page Speed, Yahoo's YSlow and WebPagetest.
The new site speed criterion isn't weighted as heavily as something like page relevance, however. Google says less than 1% of actual search queries performed are being affected by the site speed dimension in the current implementation.
Do you think web site performance should affect search result rankings?