On 19 August 2013 13:18, Jeroen Demeyer <jdeme...@cage.ugent.be> wrote: > On 08/19/2013 02:01 PM, John Cremona wrote: >> >> That seems a real killer to me. Nice new machine, lots of cores able >> to build Sage-5.11 in about 20 minutes, suddenly goes up to infinity >> with 5.12.beta1? > > Just to understand you better and not judging you: why is it a "real > killer"? Why does it matter if Sage takes a few hours to build from scratch?
It would be tolerable if the first build on a new machine took hours longer but not subsequent ones. But not if every new development release took hours. In this case, I was going to work on a ticket this morning, saw that it had dependencies which had been merged in 5.12.beta0/1 but I only had 5.11, so I started to build 5.12.beta1, and 4 hours later (on a machine with 64 cores) I am still waiting, so the amount of Sage development I have done in that time is 0. > > I believe (but I welcome other opinions) that, if this new ATLAS is better > in other respects, the ATLAS build time doesn't really matter. I would disagree if (as an extreme case to make a point) every Sage build took 24 hours. > > Note that the build time of the Sage library does matter, since it regularly > needs to be rebuilt as part of Sage development. This is not the case for > ATLAS (unless you are developing ATLAS of course). That is mysterious to me. About 5 years ago I had trouble with Atlas tuning on a laptop whose processor was not correctly recognised, and to be in the situation you describe I used SAGE_ATLAS_LIB to point to a previous Atlas build. But that stopped begin necessary ages ago. Are you saying that I should start to do that again? Surely not! So I don't understand your comment, since every time I build Sage every (standard) component is built! John > > Jeroen. > > > -- > You received this message because you are subscribed to the Google Groups > "sage-devel" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to sage-devel+unsubscr...@googlegroups.com. > To post to this group, send email to sage-devel@googlegroups.com. > Visit this group at http://groups.google.com/group/sage-devel. > For more options, visit https://groups.google.com/groups/opt_out. -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at http://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/groups/opt_out.
