Are you use SSD? I have 0.087s on it.
сб, 16 мая 2020 г., 13:57 Dominique Martinet <asmad...@codewreck.org>: > Hi, > > once in a while I get annoyed at how slow bash is to startup; using a > tiling wm poping a new shell is supposed to be quite fast but I'm > staring at a new empty window for ~1s everytime and it gets annoying... > > According to https://xkcd.com/1205/ wasting 1s 50+ times a day is worth > spending some time to try to improve it so let's see what we can do :) > > > Here's the baseline on my machine: > $ time bash -l < /dev/null > > real 0m0.341s > user 0m0.198s > sys 0m0.146s > > > And a few low hanging fruits I could find adding `-x 2>&1 | ts "%.s"`: > - down to 0.288s after removing /etc/profile.d/flatpak.sh > (flatpak-1.6.3-1.fc32.x86_64) > > - down to 0.225s after removing /etc/profile.d/modules.sh > (environment-modules-4.4.1-2.fc32.x86_64) > > - down to 0.130s after moving /etc/bash_completion.d/* to > /usr/share/bash-completion/completions/ > This one is not actually a no-op: bash-completion loads things from /etc > at shell startup time, but things in /usr at first tab time, so if the > file in /usr/share is not named by the same prefix as the command it > help completes it won't work anymore, but in most case here it will > still work just the same (slightly slower on first use) > > Here's the list of files I had in there and their packages: > authselect-completion.sh authselect-1.2.1-1.fc32.x86_64 > fcoeadm fcoe-utils-1.0.32-9.git9834b34.fc31.x86_64 > javaws.bash icedtea-web-2.0.0-pre.0.2.alpha13.patched1.fc32.x86_64 > perf perf-5.6.7-300.fc32.x86_64 > trace-cmd.bash trace-cmd-2.8.3-1.fc32.x86_64 > bpftool bpftool-5.6.7-300.fc32.x86_64 > fcoemon fcoe-utils-1.0.32-9.git9834b34.fc31.x86_64 > policyeditor.bash icedtea-web-2.0.0-pre.0.2.alpha13.patched1.fc32.x86_64 > xl.sh xen-runtime-4.13.0-7.fc32.x86_64 > cargo cargo-1.43.1-1.fc32.x86_64 > fzf fzf-0.21.1-1.fc32.x86_64 > lilv lilv-0.24.6-2.fc32.x86_64 > python-argcomplete.sh python3-argcomplete-1.10.0-4.fc32.noarch > dbus-bash-completion.sh dbus-glib-devel-0.110-7.fc32.x86_64 > gluster glusterfs-cli-7.5-1.fc32.x86_64 > lldpad lldpad-1.0.1-16.git036e314.fc32.x86_64 > redefine_filedir bash-completion-2.8-8.fc32.noarch > dog sheepdog-1.0.1-10.fc31.x86_64 > itweb-settings.bash icedtea-web-2.0.0-pre.0.2.alpha13.patched1.fc32.x86_64 > lldptool lldpad-1.0.1-16.git036e314.fc32.x86_64 > torsocks torsocks-2.3.0-5.fc32.x86_64 > > > 341 to 130ms is a good start I guess, the rest of the waiting time > probably now outweights bash and will get some looking at at a later > point, but might as well start somewhere. > > How should I go about with that? Open bz bugs to all the packages I > listed? strongly suggesting to get things to move to /usr/share (17) and > flatpak (suggest some kind of cache? not sure they'll be interested...) > and environment-modules (not sure what to suggest there, I only have > environment-modules because I need to test something with openmpi from > time to time and it comes with it...) > > > It might also make sense to have a packaging guideline suggesting to > avoid /etc/bash_completion.d in favor of the /usr/share variant, I > couldn't find anything here[1] but I might not have looked thoroughly > enough... > [1] https://docs.fedoraproject.org/en-US/packaging-guidelines/ > > > Would anyone be willing to help, something is telling me that doing this > alone would take more time than what I'd save in the end, but a few > people considering it'll help everyone might be ;) > > > Thanks! > -- > Dominique > _______________________________________________ > devel mailing list -- devel@lists.fedoraproject.org > To unsubscribe send an email to devel-le...@lists.fedoraproject.org > Fedora Code of Conduct: > https://docs.fedoraproject.org/en-US/project/code-of-conduct/ > List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines > List Archives: > https://lists.fedoraproject.org/archives/list/devel@lists.fedoraproject.org >
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