clear code... #3337

Job	Run time
macOS / Release / homebrew-clang	7m 15s
Windows / Release / cl	29m 9s
macOS / Debug / homebrew-clang	6m 7s
Windows / Release / clang	24m 39s
Ubuntu / Release / gcc	24m 35s
macOS / Release / system-clang	5m 6s
Windows / Release / clang-cl	28m 5s
Ubuntu / Debug / gcc	18m 52s
macOS / Debug / system-clang	5m 26s
Ubuntu / Release / clang	17m 47s
Windows / Debug / cl	22m 55s
Ubuntu / Debug / clang	13m 15s
Windows / Debug / clang	30m 5s
Windows / Debug / clang-cl	23m 21s
	4h 16m 37s

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