[Scons-dev] SCons speedup and profiling results...

[Dirk Bächle]

On 26.09.2013 02:08, Gary Oberbrunner wrote:

>

>

>

> [...]

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> I think this is excellent work!  Solid analysis.  I know there's been 

> some thought given to caching subst() before; it's trickier than one 

> might think but in many cases it should work, and it definitely speeds 

> things up.  I'm also impressed by a 30% memory reduction -- interested 

> to hear how that comes out.

>


I continued my work on reducing the overall memory consumption in SCons. 
By combining my old branch (where I switched the core to using slots) 
with some additional patches, I am now able to save up to 50% 
memory...depending on the project.
Please find some results attached (a comparison between the current 
default "tip" and my experimental branch), the code can be cloned from:

     hg clone http://bitbucket.org/dirkbaechle/scons_experimental -r 
reduced_memory_updated

I also achieved up to 20% speed improvements on updates, by a first 
version of a caching for the env.subst() method.

Best regards,

Dirk


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