minor #15

Job	Run time
Ubuntu / Release / gcc	20m 23s
macOS / Release / homebrew-clang	4m 50s
Ubuntu / Debug / gcc	15m 51s
macOS / Debug / homebrew-clang	3m 30s
Ubuntu / Release / clang	17m 0s
macOS / Release / system-clang	3m 51s
Ubuntu / Debug / clang	13m 5s
macOS / Debug / system-clang	2m 47s
Windows / Release / cl	20m 19s
Windows / Release / clang	20m 45s
Windows / Release / clang-cl	19m 2s
Windows / Debug / cl	19m 55s
Windows / Debug / clang	18m 50s
Windows / Debug / clang-cl	18m 0s
	3h 18m 8s

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