Re: scons-2.5.0 performance issue?
Thomas Berg <[email protected]>
| Newsgroups | gmane.comp.programming.tools.scons.devel |
|---|---|
| Message-ID | <CABYiQpkHqGp3pAUdO1qWTb=CDG_gubpYV8QvfnLDUqqtstZpnw@mail.gmail.com> |
William, I ran scons --tree=prune on a small subset of our build, and the text output goes up from 7.5MB to 35MB for that subset. I guess that means the dependency graph is four times bigger now. Cheers, Thomas On Tue, Apr 12, 2016 at 12:43 PM, Thomas Berg <[email protected]> wrote: > Bill, > > Here is the output of --debug=objects: > https://dl.dropboxusercontent.com/u/40097540/misc/scons/scons_objects_2_4_1.txt > https://dl.dropboxusercontent.com/u/40097540/misc/scons/scons_objects_2_5_0.txt > > Both are around 22MB, so here's a 3MB zip containing the two files: > https://dl.dropboxusercontent.com/u/40097540/misc/scons/scons_objects_output.zip > > The 2.5.0 output is around 2000 lines longer than the 2.4.1 output, > both are around 430 000 lines. > > As a test, is it possible to disable the cross language scanner > somehow, either by passing something to the environment or patching > the scons code? > > Dirk: thanks for the link. I have tested some but not all the tricks > used there, and I will definitely look closer at it after we > (hopefully) get to the bottom of this. > > I would at least like to understand what's going on in our case, so > thanks for all the help. Could it be that just adding a small number > of dependencies in the wrong place can, due to recursive effects, > cause such a significant increase in the processing time? > > Thanks, > Thomas > > > > > On Mon, Apr 11, 2016 at 6:02 PM, Dirk Bächle <[email protected]> wrote: >> Hi Thomas, >> >> On 11.04.2016 16:59, Thomas Berg wrote: >>> >>> Bill, below is the output of --debug=count, it is identical with >>> scons-2.4.1 and scons-2.5.0. >>> >>> Since my case was about the no-op build (nothing is built), less >>> parallelization should not be an issue. ... >> >> >> if you haven't already done so, you might want to try out my "fastcpp" >> extension at: >> >> https://bitbucket.org/dirkbaechle/scons_fastcpp >> >> . It may give you some speedup, but please regard its disclaimer. >> >> Best regards, >> >> Dirk >> >> >> _______________________________________________ >> Scons-dev mailing list >> [email protected] >> https://pairlist2.pair.net/mailman/listinfo/scons-dev _______________________________________________ Scons-dev mailing list [email protected] https://pairlist2.pair.net/mailman/listinfo/scons-dev