id	summary	reporter	owner	description	type	status	priority	milestone	component	version	severity	resolution	keywords	cc
5345	Resolve (some of) parallelism bottlenecks in test suites	Xi Ruoyao	Xi Ruoyao	"There are some parallelism bottlenecks in test suites:

- Autoconf, Libtool, Tar, and maybe others
  - Solution: set `TESTSUITEFLAGS=-j$N` globally (like `MAKEFLAGS`)
- Automake (with more than 4 cores)
  - Solution: set `-j $(($N > 4 ? $N : 4))` instead of just `-j4`
- OpenSSL
  - Solution: `HARNESS_JOBS=$N make test`
- Perl
  - Solution: `TEST_JOBS=$N make test_harness`
- Binutils, Libffi, and Findutils
  - Not solvable, limitation of DejaGNU.  GCC has managed to resolve the issue but the solution is very complex.
- Make
  - Not solvable, test suite just does not support parallelism.
- Vim
  - Not solvable, of course we cannot test an editor in a parallelized way."	enhancement	closed	normal	12.1	Book	git	normal	fixed