Re: [Scons-dev] scons-2.5.0 performance issue?

William, Thank you, I think you are onto something here. I was about to send the following observations when your last e-mail arrived: --- I did some diffing of the tree output, and found the following: - part of the growth of the tree is indeed for Qt moc files. All the correct header

Re: [Scons-dev] scons-2.5.0 performance issue?

Thomas, The prune option keeps a group of dependencies from being printed more than once. For example, you see the dependency tree for a c++ library L, but executable that files linking against L will only show that it depends on L directly and give a line stating that the dependencies of L

Re: [Scons-dev] scons-2.5.0 performance issue?

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 wrote: > Bill, >

Re: [Scons-dev] scons-2.5.0 performance issue?

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:

Re: [Scons-dev] scons-2.5.0 performance issue?

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

Re: [Scons-dev] scons-2.5.0 performance issue?

Thomas, Can you run --debug=objects on the other versions as well? Just want to see if the object counts have change significantly between 2.5.0 and the others. Thanks, Bill On Mon, Apr 11, 2016 at 10:59 AM, Thomas Berg wrote: > Bill, below is the output of

Re: [Scons-dev] scons-2.5.0 performance issue?

Thomas, Even on no-op, the difference in dependency generation could be substantial. Consider comparing '--tree=prune' between a small QT target between 2.5.0 and 2.4.1 and I think you will see that they are quite different. V/R, William On Mon, Apr 11, 2016 at 3:59 PM, Thomas Berg

Re: [Scons-dev] scons-2.5.0 performance issue?

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. We do have about 900 Qt Moc generated files in our build, and I guess 1-2000 other generated

Re: [Scons-dev] scons-2.5.0 performance issue?

Thomas, Can you run and post with "--debug=count"? Thanks, Bill On Mon, Apr 11, 2016 at 7:14 AM, Thomas Berg wrote: > Hi all, > > First of all, thanks for the 2.5.0 release! > > I have tested it in the build at my dayjob now, where we have a large > C++ application built