Re: [Boost-build] Major engine changes

Subject: Re: [Boost-build] Major engine changes
From: Nogradi, Chris (Chris.Nogradi_at_[hidden])
Date: 2011-12-01 17:14:30

Steve,

Wow thanks again!  Another ~1.7x speed increase (actual total increase is 3x from the original changes)!  I also made some changes to our jam files to reduce the amount of targets so here are the new numbers:

Before changes (Nightly from June 3 2011):

$ time Tools/boost-build/bin/bjam.exe all msvc -j8
...patience...
...patience...
...patience...
...patience...
...found 40506 targets...

real    1m43.617s
user    0m0.015s
sys     0m0.000s

After changes (SVN 75749):

$ time Tools/boost-build/bin/bjam.exe all msvc -j8
...patience...
...patience...
...patience...
...patience...
...found 40506 targets...

real    0m56.602s
user    0m0.031s
sys     0m0.046s

After newest changes (SVN 75765):

$ time Tools/boost-build/bin/b2.exe all msvc -j8
...patience...
...patience...
...patience...
...patience...
...found 40506 targets...

real    0m33.896s
user    0m0.000s
sys     0m0.015s

Again thanks for all your work!

Chris

-----Original Message-----
From: boost-build-bounces_at_[hidden] [mailto:boost-build-bounces_at_[hidden]] On Behalf Of Steven Watanabe
Sent: Thursday, December 01, 2011 1:36 PM
To: Boost.Build developer's and user's list
Subject: Re: [Boost-build] Major engine changes

AMDG

On 11/30/2011 01:18 PM, Nogradi, Chris wrote:
> We are also seeing ~2x speed increases on our builds with your changes:
>
> <snip>
> No-op time after:
>
> $ time Tools/boost-build/bin/b2.exe all msvc -j8
> ...patience...
> ...patience...
> ...patience...
> ...patience...
> ...found 46217 targets...
>
> real    1m8.487s
> user    0m0.000s
> sys     0m0.000s
>
> I need to get our no-op times down to < 15 seconds so your work is greatly appreciated.

Can you try my latest patch?  What I'm seeing is:

With bjam -n -d0 in $BOOST_ROOT/status
Before: 162.668 seconds
After: 71.886 seconds

With bjam -n -d0 --build-type=complete in $BOOST_ROOT
Before: 28.042
After: 15.2 seconds

In Christ,
Steven Watanabe
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