Optimization

From: Vladimir Prus (ghost_at_[hidden])
Date: 2003-12-11 05:41:19

Folks,
yesterday I've tried to optimize some of Boost.Build. I get not very dramatic 
(around 25%), but noticable and reproducible speedup.

I would appreciate help with further optimizations. 

First way to help is to run the current version on your project and send me 
the profile. To get profile you can use "bjam -n -d+10 > profile"
Since I don't know how anonymous CVS works at the moment, I've placed the 
complete package to

http://zigzag.cs.msu.su:7813/Milestone_10_dev2/

Second way to help is optimize something. Just look at your profile (I usually 
import it into spreadsheet), sort by execution time, and pick a rule which 
you'd like to optimize. I think best canditates are "utils" rule, which are 
frequently called, but are not so complex in intself. Then, optimize the 
rule ;-), e.g. by implementing it in "C".

Of course, I'd be glad to discuss what rules are better optimized for your 
profile and how to optimize them, in detail.

TIA,
Volodya