Re: Guile + Boehm GC: First Remarks

[Han-Wen Nienhuys]

Ludovic Courtès schreef:
> > > But please, relax about performance, we still haven't run any meaningful
> > > benchmark.  ;-)
> > btw, is there any news on this patch?  I'm quite keen on dumping
> > LilyPond's Rational class in favor of Scheme rationals, but adding gc
> > mark functions for that is just too much work; BGC would be a nice
> > soluiton to this.
>
> Well, no real news.  My "not-so-meaningful benchmarks" (running a
> loop[*]) reproductively show that "GBGC" is noticeably slower than "real
> Guile" (1.5 to 2 times slower).

I've patched it a bit to use GC_typed alloc for tagged data. It probably 
doesn't make much of a difference, since 90% of the data is regular 
cells, but see http://www.xs4all.nl/~hanwen/public/software/guile-bgc.patch

With the tree benchmark (included in patch, I get 54 secs (Guile 1.8) 
vs. 1:25 (typed BGC). I forgot to measure regular BGC, though.

Note that BGC has ALL_INTERIOR_POINTERS switched on by default 
nowadays, which means that it may scan too much. You could try switching 
that off.

--
 Han-Wen Nienhuys - address@hidden - http://www.xs4all.nl/~hanwen