Re: [jamboost] Library order

From: Jürgen Hunold (hunold+lists.Boost_at_[hidden])
Date: 2004-02-01 13:56:11

Hi Volodya !

On Friday 30 January 2004 15:22, Vladimir Prus wrote:
> I've just comitted code which computes proper library order for gcc.
> The implementation is quite simple and supposedly inefficient, but on
> my project the performance did not suffer.

Well, today all hell broke loose again. It is "inefficient". ;-((
My problem:
Bjam startup time for RailSys build went up from 90 seconds to 22 
minutes (!). That means building 6 full scale executables and some 
tools from toplevel Jamfile. 
startup time for my biggest single target exploded from 60 seconds to 5 
minutes. 

Question: How can I disable library ordering ?

Information: My "libraries" are quite "unordered" and have *lots* of 
circular dependencies. 
For other targets, with much better design (free of legacy), the impact 
is much lower, but still measurable.

> I'd appreciate some testing of this new code. I attach the notes
> telling how it's supposed to work.

I can run more tests at work, providing more profiling data when needed.
Just drop a note ;-)

Yours,

Jürgen

-- 
* Dipl.-Math. Jürgen Hunold ! Institut für Verkehrswesen, Eisenbahnbau
* voice: ++49 511 762-2529 ! und -betrieb, Universität Hannover
* fax : ++49 511 762-3001 ! Appelstrasse 9a, D-30167 Hannover
* hunold_at_[hidden] ! www.ive.uni-hannover.de