How do you measure that effect? sage-on-gentoo (and other sage-on-distro I would believe) don’t do that. Or any other stuff of that kind.
François > On 25/08/2017, at 21:59, Erik Bray <[email protected]> wrote: > > On Fri, Aug 25, 2017 at 11:47 AM, Erik Bray <[email protected]> wrote: >> On Fri, Aug 25, 2017 at 10:31 AM, Harald Schilly <[email protected]> wrote: >>> Inside sage -sh: >>> >>> (sage-sh) ...@compute8-us:build$ time echo "print()" | ipython > /dev/null >>> >>> real 0m1.122s >>> user 0m0.812s >>> sys 0m0.080s >>> (sage-sh) ...@compute8-us:build$ time echo "print()" | python > /dev/null >>> >>> real 0m0.014s >>> user 0m0.008s >>> sys 0m0.004s >>> (sage-sh) ...@compute8-us:build$ time echo "print()" | ipython > /dev/null >>> >>> real 0m1.076s >>> user 0m0.796s >>> sys 0m0.064s >>> >>> (sage-sh) ...@compute8-us:build$ time echo "print()" | python > /dev/null >>> >>> real 0m0.014s >>> user 0m0.008s >>> sys 0m0.004s >> >> Looking at these numbers it would seem (unsurprisingly) that IPython >> is the primary culprit. IPython has always been a little noticeably >> slower to start up for me though. > > I found this to also be a significant source of slowdown, every time > sage-env is sourced (even just when running something like `sage > -sh`): > > 423 # Use a matplotlib config directory specific to Sage and specific to > 424 # the version number of matplotlib, by setting the environment > 425 # variable MPLCONFIGDIR. Note that we can't find the version number by > 426 # importing matplotlib, because that could create matplotlib's standard > 427 # config directory. So we use pkg_resources. > 428 "$SAGE_LOCAL/bin/python" -c 'import pkg_resources; > pkg_resources.get_distribution("matplotlib").version' 2>/dev/null > 429 if [ $? -eq 0 ]; then > 430 MPLVERSION=`"$SAGE_LOCAL/bin/python" -c 'import pkg_resources; > print (pkg_resources.get_distribution("matplotlib").version)'` > 431 MPLCONFIGDIR="$DOT_SAGE/matplotlib-$MPLVERSION" > 432 export MPLCONFIGDIR > 433 # The directory is created when Sage starts (see sage.misc.misc). > 434 fi > > That's two extra Python interpreter calls every time almost any `sage` > command is run. This can probably be avoided, somehow... > > Erik > > -- > 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 [email protected]. > To post to this group, send email to [email protected]. > Visit this group at https://groups.google.com/group/sage-devel. > For more options, visit https://groups.google.com/d/optout. -- 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 [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.
