[pacman-dev] [PATCH] makepkg: parallelize integrity checks
allan at archlinux.org
Sat Apr 23 02:22:13 EDT 2011
On 23/04/11 02:16, Dan McGee wrote:
> This enables parallel integrity checks in makepkg within a given family
> of integrity sums. Subshell jobs for each source file are kicked off and
> run in parallel, and then we wait for each of them in turn to complete
> and print the same information as before.
> Note that programming sense says this loop should be done differently
> for filesystem access reasons; doing all checks for a given file would
> make more sense rather than running through the filelist multiple times.
> However, that would be a very different patch than what this is trying
> to accomplish.
> On a completely suited for the task PKGBUILD containing md5sums ans
> sha256sums of several large data files, as well as a failing integrity
> check so, this brings execution time way down:
> $ time makepkg -f 2>/dev/null
> real 0m7.924s
> user 0m7.293s
> sys 0m0.480s
> $ time ~/projects/pacman/scripts/makepkg -f 2>/dev/null
> real 0m2.447s
> user 0m7.470s
> sys 0m0.537s
> Signed-off-by: Dan McGee<dan at archlinux.org>
Ack. I guess we should also do the same for generating the checksums
with "makepkg -g".
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