Too many WordPress plugins can degrade site performance

[djbaxter]

Does It Matter If I Use 1 Plugin Or 100s Of Them?
by Keith Dsouza
June 19th, 2009

The answer is yes, it does matter, each and every plugin you use has to be processed before an actual page is generated, so all the plugin files are compiled in order to get the intended output.

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Another problem has to do with how many database queries a plugin adds.

Optimizing WordPress database performance
by Joost de Valk (Yoast)
30 March 2009

I've been working with a plugin that was mentioned on the wp-hackers list last week, called debug queries, to optimize the performance on some of my sites, including this one.

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"Heavy" plugins
It turns out, that of the 16 queries my site now still does for a single post page, 7 are for the related posts plugin I'm using, YARPP, and if you're wondering: yes that's making me reconsider the plugin. I'm going to try a couple [of] other plugins and see how good they do in both relevance and (database) performance.

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[Linda Buquet]

That makes sense and is something to consider for sure.

Thanks, David