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

[Dirk Bächle]

Hi Rupert,

On 26.09.2013 09:24, rupert THURNER wrote:

> On Thu, Sep 26, 2013 at 8:44 AM, Dirk Bächle <tshortik at gmx.de> wrote:

>> Hi Gary,

>>

>> On 26.09.2013 02:08, Gary Oberbrunner wrote:

>>>

>>>

>>> [...]

>>>

>>>

>>> what are the main things which make waf, and wonderbuild so much

>>> faster than scons? a test is here, but already a little outdated:

>>> http://retropaganda.info/~bohan/work/psycle/branches/bohan/wonderbuild/benchmarks/time.xml

>>>


the main difference between SCons and waf/wonderbuild regarding run 
times for updates is, that the latter two don't offer a "recursive 
variable substitution" feature (the subst() method in SCons). 
Additionally, wonderbuild is trimmed to speed by sacrificing 
correctness, e.g.  it's CPP scanner doesn't care about "#ifdef"s.
Waf handles this much better, I guess...but I didn't check its sources.

Regards,

Dirk