Re: [Fwd: [Bug c++/14563] octave built under Cygwin very slow]

[Paul Thomas]

After I followed up John's suggestion of looking through the list  just 
after the release of 2.139, I realise that I understand nothing about 
signal and error handling; this will have been apparent from my two last 
messages!  I have a weekend of contemplation of such matters in front of 
me.....

Paul T

Paul K, I think your suggestion of masking out the sjlj calls is a good 
one - I just have to figure out how to go about it.

> tree_simple_for_command => do_for_loop_once => quit_loop_now => 
> OCTAVE_QUIT
>
> Thus in the profiling tests, OCTAVE_QUIT was getting called 1 million 
> times.
>
> > use exception handling very extensively.
> >
> > If you think it might be exception handling, then you might also look
> > at the uses of the macros related to exception handling that are
> > defined in libcruft/misc/quit.h and see if they now appear in places
> > that would be executed by code that demonstrates the slowdown.
> >
> > jwe
> >
> >
> >