Re: [Boost-build] bjam slow, can I disable the dependency check?

From: Vladimir Prus (ghost_at_[hidden])
Date: 2006-04-07 02:40:45

On Thursday 06 April 2006 20:55, Greg Wilding wrote:

> I'm wondering of there is a way to disable the dependency check (binding?)
> when bjam is invoked. I find that 95% of the time I only need to compile
> one file and then re-link an executable.
>
> I know this sounds like heresy, so here's a little background so you know
> where I'm coming from... My team is using boost to build a project that
> consists of around 8000 source files organized into 100 or so subprojects
> (Jamfiles). The build produces about 50 binaries from a large library of
> shared source code. The build works for Linux and Solaris.
>
> We are using boost because we require a reliable incremental build after a
> workspace has been updated. When bjam is invoked, it takes around 60
> seconds before any compiling starts on a 3Ghz Machine (I'm assuming that
> most of this time is checking dependencies).

Hi Greg,

for "bjam foo.o" I think the dependency check itself should not take any time, 
and the delay you observe is probably caused by something else.  Can you run 
bjam with:

  bjam -n -d+10 > profile

and send me the output so that I can find where the most time is spent? Also, 
are you using Boost.Build V2 or V1?

- Volodya

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