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

[Dirk Bächle]

Hi Johan,

thanks a lot for your trying out my experimental branch.

On 01.10.2013 22:00, Johan Holmberg wrote:

>

> [...]

>

> Hi!

>

> I tried your branch "reduced_memory_updated" and noticed that when I 

> alternate between using that branch and the "default" branch from the 

> main SCons repository, some files in my project are rebuilt. Has the 

> signature calculation in your branch been changed so I should expect 

> this to happen?

>


Yes, this is supposed to happen. Since the core classes like Node and 
FileNodeInfo now use slots and single data members can get "None", I 
counted the internal version number for all signature info related 
instances up from "1" to "2".This change is what causes the rebuilds...

Best regards,

Dirk


> I use:

>

> - f4f09fbddf29 from "default" branch in main SCons repo

> - 3b330d4bc8dc from "reduced_memory_updated" in your 

> "scons_experimental" repo

>

> Apart from this I see the memory consumption decrease from 720MB --> 

> 450MB, and the up-to-date check time drop from 2m20s --> 1m57s.

>


Just out of curiosity: Is this one of the projects from the testsuite, 
or is it your own?