Branch: refs/heads/master Home: https://github.com/openSUSE/obs-build Commit: c06f7d70204f0ab9e5563d10f9af372c356f6feb https://github.com/openSUSE/obs-build/commit/c06f7d70204f0ab9e5563d10f9af372... Author: Dirk Müller Date: 2022-01-12 (Wed, 12 Jan 2022) Changed paths: M dist/build.spec M dist/debian.control M init_buildsystem Log Message: ----------- Batch calling external commands in a loop In many cases rather than invoking the same command in a loop we can collect all the arguments and use xargs to batch up the invocations. this reduces the per-loop iteration overhead. In the smallest package in tumbleweed this saves about 1s of execution overhead on a very fast x86_64 cpu, and 3-5s on a slower aarch64 cpu. larger packages that install more dependencies have better outcomes. measurement of just init_buildsystem for xterm package setup on a tmpfs store: before: 2.63user 1.02system 0:03.32elapsed 109%CPU (0avgtext+0avgdata 36232maxresident)k 584inputs+496288outputs (9major+576786minor)pagefaults 0swaps after: 1.81user 0.74system 0:02.26elapsed 112%CPU (0avgtext+0avgdata 36052maxresident)k 584inputs+496288outputs (20major+246016minor)pagefaults 0swaps Commit: 4ee1c18fe351fa677a23614b11d79e95c17f4f8b https://github.com/openSUSE/obs-build/commit/4ee1c18fe351fa677a23614b11d79e9... Author: Michael Schroeder Date: 2022-01-14 (Fri, 14 Jan 2022) Changed paths: M dist/build.spec M dist/debian.control M init_buildsystem Log Message: ----------- Merge pull request #749 from dirkmueller/loop_strength Avoid calling external commands in a loop Compare: https://github.com/openSUSE/obs-build/compare/7b51dc72c470...4ee1c18fe351