I have a site that has a large menu and each item on the menu has an icon. I have been looking into implementing a CSS sprite to speed it up, but I am wondering what the performance gain will be. My site is not open to the public so the users will almost always be repeat, so is it worth implementing or should I just rely on caching?
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Unless your site has heavy non-repeat traffic, there probably won’t be much of a noticeable performance gain at all. Are you currently having performance problems? If not, there’s probably no need to prematurely optimize such a relatively minor thing.