Ohodnoceno 3 z 5 hvězdiček
Unfortunately on many sites it is very inaccurate. With an empty cache, try loading a site like CNN, see the counts add up, only then to revert to some marginal number upon completion, listing that the entire page is only 70KB and took 2.3 secs. All while yslow says 1.2MB and 53 secs. The latter being correct. Tried with several other sites too. It erroneously reports that the abcnews page is only 155KB while yslow pegs it at 1556 KB. Both said 45secs. Then later extended changes its numbers??
This is on Firefox 20.
So, sometimes this add-on has it right, but in initial testing it is often a miss, at least partially, only reporting part of the true load or time that expired.