Re: 2.13.40 regtests

[Phil Holmes]

"Phil Holmes" <address@hidden> wrote in message news:...
> "Graham Percival" <address@hidden> wrote in message 
> news:address@hidden
> > On Fri, Nov 26, 2010 at 07:10:25PM -0000, Phil Holmes wrote:
> > > Done this - comparing .39 with .40.  I did a pixel-by-pixel
> > > comparison, allowing a leeway of 1 in pixel brightness (range is 0
> >
> > > It identified 21 files with changes.
> >
> > Wow, I was expecting much more!  In that case, this is definitely
> > worth adding.
> >
> > Short-term, I think it's enough if you just use it on your local
> > computer, and use it to identify regressions.  In the medium
> > (3-month)-term, we'll look at adding a pixel comparison to the
> > official build process, somehow.
> >
> > Cheers,
> > - Graham
>
> http://www.holmessoft.co.uk/homepage/lilypond/imagediffs.htm

I've now re-written the program to be multithreaded - max 4 threads, so 4 
instances of LilyPond compiling at the same time.  My old version also did 
logfile checking, but I couldn't get this to work with multiple threads - 
think each was over-writing the output from the other thread - so I've 
dropped that completely.  The multithreaded version ran in about 25 minutes, 
generating and comparing about 2000 files.  I think the next enhancements 
will be to state and flag the differences where they are minor (less than 10 
pixels, say).

The PC is unusable when it's running - all the Ghostscript command line 
interfaces get in the way.

--
Phil Holmes
Bug Squad