[Greasemonkey] speed and profiling of GM scripts

[Tony Chang]

On Mon, Jun 06, 2005 at 03:39:50PM -0400, Anthony Lieuallen wrote:
> 
> > - - are there major speed gotchas in the DOM navigation API to watch out
> >   for?  any generic speedup tips for GM scripts?
> 
> Avoid innerHTML if possible.  Again I don't have any evidence at the
> moment but I'm quite certain direct DOM manipulation is faster. 
> Plenty of GM scripts like linkify out there which you can use as
> examples.

I think PPK would disagree with you:
http://www.quirksmode.org/dom/innerhtml.html

In this specific example, my guess is that it won't matter much because
the amount of code you're generating is small.  I would think that the
slowness has to do with having to re-render the table for every cell
change.  You may get a speed increase if you set the display to 'none' on
the table, do your modifications, then make the table visible again.  But
that's just speculation.

Tony


-- 
Tony Chang
http://ponderer.org