Re: [Boost-build] BBv2 intolerably slow in Boost tree.

From: Vladimir Prus (ghost_at_[hidden])
Date: 2006-07-26 13:08:21

On Wednesday 26 July 2006 21:05, Rene Rivera wrote:
> Vladimir Prus wrote:
> > What's performance of V1? I can replace the globbing code with that we
> > have there, as a quick solution.
>
> Just running the globing of headers, on Win2K under MSYS run a few times
> to cache the filesys info:
>
> grafik_at_KLUDGE /c/DevRoots/Boost/boost
> $ date ; bjam > /dev/null ; date ; bjam --v2 > /dev/null ; date
> Wed Jul 26 12:01:04 CDT 2006
> Wed Jul 26 12:01:08 CDT 2006
> Wed Jul 26 12:01:34 CDT 2006
>
> So thats 4s for BBv1, and 26s for BBv2. Also I just noticed that the
> BBv2 code still misses some headers it should be copying that don't have
>   file extensions.

It sounds that borrowing V1 logic would be a good idea. I'll try to see where 
this performance difference comes from, though, as the code should be doing
almost the same.

- Volodya

-- 
Vladimir Prus
http://vladimir_prus.blogspot.com
Boost.Build V2: http://boost.org/boost-build2