Moving to a compiler that drops support for OpenMP seems a sad choice, especially now we’ve all climbed the learning curve of the non-Apple compiler (the real barrier was lack of a pkg installer and that’s done now).
Losing OpenMP for the CRAN version of OpenMx/umx (our SEM packages) would be a big loss for users (for whom the CRAN version now supports OpenMP giving them a 2-12x speed up). In general, R on Mac is made more viable by having OpenMP Re Brian’s points, I’d say that the distribution problem is crucial: Packages not on CRAN have dramatically diminished accessibility/useage. Second, a great range of compute-intensive problems are amenable to division amongst cores, including nearly all models that take more than a nominal amount of time to run: So simulations, CIs, bootstrapping, nearly everything in genetics all speeds up. I’d say especially on desktop/laptop. The big advantage of multi blade systems requires snowfall-type solutions, but desktops profit automatically from their multi-core structure and don;’t have multiple processors (except graphics, which no-one seems to be exploiting on CRAN-style R), so OpenMP is their one trick. I’d hope not to lose it. Best, t > On 2 Apr 2020, at 05:18, Prof Brian Ripley <rip...@stats.ox.ac.uk> wrote: > > On 01/04/2020 22:02, Simon Urbanek wrote: >> JJB, >> 1. correct, there was too much trouble in this. But please feel free to >> start a new thread about this here if you have strong opinions. > > Also note that it is possible (and not hard) to install packages from source > with an OpenMP-supporting compiler, and how to do so is in the R-admin > manual. The problems come in distributing them. > > The benefits of OpenMP are often overestimated, especially on desktop/laptop > level hardware. But it is available for the small (tiny?) proportion of > users who need it. The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336. _______________________________________________ R-SIG-Mac mailing list R-SIG-Mac@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-mac
