According to what I know about browsers' algorithm of CSS processing, selector `*+p` has less perfomance impact than `p+*`, doesn't it? 

So, in the `p+*` browser scans through all elements on the page, and those that follow `p` are applied a corresponding rule.
In the `*+p` firstly it looks only for `p`, but does it stop the search immediateliy after finding some element before `p`, thus making less "search iterations"? Or `*` still scans here everything.

Also, which tools can show CSS loading time and other 'heavyweight' information. Found only those that search for unused or excess rules and compress the CSS for getting less size.

In context - I need to apply top-margin to any element that follows `p` (except `p+p`), the content is generated dynamically.
Having read that old browsers suffer much of universal selector, this very question had arised.