(+indygreg) > On Nov 11, 2019, at 03:04, Pierre-Yves David <pierre-yves.da...@ens-lyon.org> > wrote: > > Hi everyone, > > I am looking into introducing parallelism into `hg debugupgraderepo`. I > already have a very useful prototype that precompute in // copies information > when converting to side-data storage. That prototype use multiprocessing > because it is part of the stdlib and work quite well for this usecase. > > However, I know we refrained to use multiprocessing in the past. I know the > import and boostrap cost was to heavy for things like `hg update`. However, I > am not sure if there are other reason to rule out the multiprocessing module > in the `hg debugupgraderepo` case.
I have basically only ever heard bad things about multiprocessing, especially on Windows which is the platform where you'd expect it to be the most useful (since there's no fork()). I think Greg has more details in his head. That said, I guess feel free to experiment, in the knowledge that it probably isn't significantly better than our extant worker system? > > Cheers, > > -- > Pierre-Yves David > _______________________________________________ > Mercurial-devel mailing list > Mercurial-devel@mercurial-scm.org > https://www.mercurial-scm.org/mailman/listinfo/mercurial-devel _______________________________________________ Mercurial-devel mailing list Mercurial-devel@mercurial-scm.org https://www.mercurial-scm.org/mailman/listinfo/mercurial-devel
