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

From: Vladimir Prus (ghost_at_[hidden])
Date: 2006-07-26 12:48:32

On Wednesday 26 July 2006 19:42, David Abrahams wrote:
> Vladimir Prus <ghost_at_[hidden]> writes:
> > On Wednesday 26 July 2006 18:15, David Abrahams wrote:
> >> Simple things like rebuilding the "html" target in libs/parameter/doc
> >> or rebuilding the "sfinae" target in libs/parameter/test produce an
> >> intolerably long delay for me before any build actions start.
> >
> > For a start, is delay the same on the second invocation as it is on
> > the first?
>
> To my perception, yes.

In my case, on cold run it takes ~30 seconds, and then ~2. Probably because 
there's 6G of memory here, so all disk accesses are cached.

>
> > Also, can you try the attached patch to top-level Jamfile.v2?
>
> With the patch, it flies!

What's performance of V1? I can replace the globbing code with that we have 
there, as a quick solution.

I also planed to make globbing lazy -- and don't it it unless we're installing 
-- but maybe that's not important if V1 code works fine.

- Volodya

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