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What is the disadvantage of having many CSS selectors?
Are there any performance problems associated with having lots of CSS selectors? Any links/real tests?
I’ve found https://addons.mozilla.org/en-us/firefox/addon/css-usage/ and the only reason why i see its use is because it might help removing unused CSS classes from the final CSS so it would be smaller. But its cached by the browser anyway so i see a problem with its size.
It has a mild effect on render performance, but the main reason for avoiding it is that it tends to be a bad smell, indicating complicated overrides between different rules, resulting in a hard-to-maintain stylesheet.