On 05/11/2008, Ludovic Courtès <[EMAIL PROTECTED]> wrote:
> Hello!
>
> I finally [0] conducted experiments to compare Guile's GC with my port
> of Guile to the Boehm-Demers-Weiser GC (BDW-GC). The code for that port
> is not currently available on-line but I'd be happy to push it somewhere
> (would Guile's repo at Savannah be a good fit?).
I don't see why not...
Just a couple of quick comments on the results...
> The Results
> -----------
>
> There are two benchmarks where BDW-GC is both faster and less
> memory-hungry than Guile's GC (marked with an `!'):
> For `string', I expect it to be partly due to the fact that under
> unmodified Guile it's libc's malloc that's exercised more than the GC
> itself (since stringbuf contents are allocated with `malloc ()').
How is that different in BDW-GC Guile?
>
> In most other cases, BDW-GC yields smaller execution times at the
> expense of increased heap usage.
It's always possible to trade execution for heap, isn't it? For
example, I presume we could configure current Guile so as to gc less?
In these results, it looks like Guile is quicker for a given heap size
- or smaller for a given execution time.
>
> I think the question of whether BDW-GC is "worth it" becomes more of an
> engineering matter if performance is neither problematic not
> exceptional.
Do you just mean having to maintain the code?
Regards,
Neil
