install-qa-check.d/60pngfix: parallel support (bug 630292)
If xargs supports the --max-procs option then use the makeopts_jobs
function from helper-functions.sh to generate a --max-procs argument.
Use xargs -L 1 to limit the number of png files per pngfix process,
in order to ensure that enough processes are spawned, since otherwise
xargs minimizes the number of processes spawned. A benchmark with
flightgear-data-2018.2.1 shows that larger values of -L only decrease
performance.
Bug: https://bugs.gentoo.org/630292
Reviewed-by: Lars Wendler <polynomial-c@gentoo.org>
Reviewed-by: Mike Gilbert <floppym@gentoo.org>
1 file changed
