Unused CSS

[casper434]

Is there any advantage to removing unused CSS on a wp theme template. If removed will it not merely be added with the next update?

[CoreyNorthcutt]

• There is a marginal advantage to smaller CSS files, in terms of page speed.  I believe that Google's PageSpeed and Yahoo!'s ySlow both recommend that you're using a 'minify' tool on both your CSS and JavaScript in fact.  But again, the improvement is more often than not extremely minimal compared to other performance enhancements like Varnish.

• WordPress updates the default theme only when you do an upgrade.  So if the CSS file is attached to the default theme, yes.  Otherwise, no.