I heard that a heavily commented script runs slightly slower than a non-commented one. Is it true?
Did anyone test this? (like how much slower is it in percentages)
@Degar007 posted important info that alone answers the OP: 10,000 lines of comments take 2 seconds to interpret. Between Wordpress, its plugins, and its theme, there may be at least 10,000 lines of comments. So, by removing all comments from WP we could speed each site's initial load time by 2 seconds. Multiply that by tens of millions of PHP CMSs, CRMs etc, around the globe, and that's 1 megawatt of power saved, right there.