I would have hoped there would be no impact unless I was actually
using it. It's not very convenient that I have to disable or remove
this addon (or use multiple profiles) to avoid a performance penalty
in normal browsing.

Although I would add that Firebug is so brilliant I have nothing
really to complain about.

On Nov 7, 10:44 pm, John J Barton <[EMAIL PROTECTED]> wrote:
> Depends on the size and number of evals, but if you are beyond trivial
> number then yes, you should expect a slowdown on Firebug 1.1-1.3.
>
> You won't see a slow down on Firebug 1.0 because there is no eval()
> debugging support in 1.0.
>
> You will see a much lower slowdown in Firebug 1.4 unless you are using
> breakpoints.  If you breakpoint an eval function, you are back to the
> same as 1.3.
>
> The cause is 1) every function compiled takes a (hidden) breakpoint
> and some JS code 2) every eval buffer is passed thru MD5.
>
> jjb
>
> On Nov 7, 2:34 pm, The Love Dada <[EMAIL PROTECTED]> wrote:
>
> > I raised this bugzilla record 
> > todayhttps://bugzilla.mozilla.org/show_bug.cgi?id=463669
> > when I noticed a sudden slowdown in a particular eval() I was doing -
> > turns out this is completely resolved by uninstalling Firebug.
>
> > I would quite expect a slowdown if the profiler was running for
> > example but I see a very noticeable slowdown even when Firebug is not
> > being used, i.e. console not open, profiler not running etc. Is that
> > something to be expected  or a bug ?
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