Hi! Some more improvements come from these commits:
ac19950507 gnu: bootstrap: Cache the 'bootstrap-executable' origins. 5166d02730 gnu: bootstrap: 'bootstrap-origin' preserves eq?-ness when no changes are made. d727a9343d derivations: Don't memoize 'derivation->bytevector'. f5fca9a82c gexp: Cache the module to derivation mappings. c57e417eff store: Allow objects in the cache to be inserted and search for with 'equal?'. f58b45350b gexp: Add 'imported+compiled-modules'. f726f6f802 derivations: 'build-expression->derivation' caches its module derivations. cf7648f882 derivations: Introduce 'imported+compiled-modules'. This caches the module-to-derivation mapping, which wasn’t cached until now. Overall the goal is to have the high-level caches work nicely (the “object cache” in particular), rendering the low-level caches (such as the ‘add-data-to-store’ cache) potentially useless. This is beneficial because a cache hit on the object cache saves more CPU time than a cache hit on a low-level cache. Ludovic Courtès <l...@gnu.org> skribis: > $ time guix build libreoffice -nd > /gnu/store/8drmbhsrayr2j5lkvrwq37rg8g06hgsw-libreoffice-6.1.5.2.drv > > real 0m2.142s > user 0m2.323s > sys 0m0.082s > $ guix describe > Generacio 110 Oct 14 2019 08:43:33 (nuna) > guix bd04fe8 > repository URL: https://git.savannah.gnu.org/git/guix.git > branch: master > commit: bd04fe878627a14533d908ccdf5b906050d6e0a4 And now: --8<---------------cut here---------------start------------->8--- $ time /tmp/new/bin/guix build libreoffice -nd /gnu/store/ibzap0v1c367h0j2mdd2jmlsfx9jplfb-libreoffice-6.1.5.2.drv real 0m1.658s user 0m1.699s sys 0m0.073s $ /tmp/new/bin/guix describe Generacio 1 Oct 28 2019 00:03:05 (nuna) guix 271b3c9 repository URL: https://git.savannah.gnu.org/git/guix.git branch: master commit: 271b3c9d16f8880f4a27b52a615cdec611322fae --8<---------------cut here---------------end--------------->8--- Ludo’.
