Ha, I also keep around my Thinkpad T61 for occasional testing for this purpose, although usually I avoid building on it as that takes a lonnnnnng time.
On Tue, Oct 29, 2019 at 10:57 AM Drew Van Zandt <drew.vanza...@gmail.com> wrote: > Let me encourage some of y'all to stick with an older machine, or keep it > around for testing... the latest build of KiCAD is noticeably laggy on my > machine, which is not terribly fast (but also not that old). It makes some > of the bugs I have reported worse, and their fixes have been pushed out to > 6.x (for perfectly good reasons). > > I am a bit manic, though, as Jon can attest; patience is last on my list > of accessible virtues. > > > *Drew Van Zandt* > > > On Tue, Oct 29, 2019 at 10:40 AM Simon Richter <simon.rich...@hogyros.de> > wrote: > >> Hi, >> >> On Mon, Oct 28, 2019 at 10:20:45PM -0700, Andrew Lutsenko wrote: >> >> > I kinda expected 2x maybe 3x decrease because not all computations scale >> > linearly with number of threads. I was pleasantly surprised by almost 6x >> > decrease in clean build time and 5x in incremental builds. >> >> FWIW, we have a number of bottlenecks in the build process: >> >> - dependency generation of common doesn't start until the version header >> is generated, which only happens after bitmaps and gal are complete >> - dependency generation of pcbnew_kiface doesn't start until the python >> wrapper is generated, which takes ages itself. >> - the python wrapper is compiled as one of the last things, and the >> linker >> must wait for that. >> >> We could probably shave off another two or three minutes of build time if >> we could make sure that we always make progress on the critical path. The >> dependency generation as a side effect pulls all the sources and headers >> into cache, which reduces the effects of I/O latency a bit during >> compilation, so parallelizing with more than the number of threads you >> actually have is probably counterproductive. >> >> Numbers with CPU time as percent of real time: >> >> clean ~15 ~5 tip >> E5-2620v4 (32) 7:04.87 5:18.74 5:16.64 3:40.92 >> 2243% 1854% 1854% 1330% >> T2P9D01 (64) 5:16.37 4:14.04 4:10.26 3:20.97 >> 3360% 2558% 2570% 1546% >> >> Simon >> >> _______________________________________________ >> Mailing list: https://launchpad.net/~kicad-developers >> Post to : kicad-developers@lists.launchpad.net >> Unsubscribe : https://launchpad.net/~kicad-developers >> More help : https://help.launchpad.net/ListHelp >> > _______________________________________________ > Mailing list: https://launchpad.net/~kicad-developers > Post to : kicad-developers@lists.launchpad.net > Unsubscribe : https://launchpad.net/~kicad-developers > More help : https://help.launchpad.net/ListHelp >
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