fixup! fixup! CMP: add documentation #1352

Job	Run time
compiler (gcc-7, ubuntu-20.04)	4m 23s
compiler (gcc-8, ubuntu-20.04)	7m 22s
compiler (gcc-9, ubuntu-20.04)	4m 35s
compiler (gcc-10, ubuntu-20.04)	4m 24s
compiler (gcc-11, ubuntu-22.04)	4m 38s
compiler (gcc-12, ubuntu-22.04)	5m 4s
compiler (gcc-13, ubuntu-22.04, ubuntu-toolchain-r/test)	7m 14s
compiler (clang-6.0, ubuntu-20.04)	4m 48s
compiler (clang-7, ubuntu-20.04)	4m 47s
compiler (clang-8, ubuntu-20.04)	6m 17s
compiler (clang-9, ubuntu-20.04)	6m 44s
compiler (clang-10, ubuntu-20.04)	4m 48s
compiler (clang-11, ubuntu-20.04)	4m 44s
compiler (clang-12, ubuntu-20.04)	4m 56s
compiler (clang-13, ubuntu-22.04)	5m 6s
compiler (clang-14, ubuntu-22.04)	5m 1s
compiler (clang-15, ubuntu-22.04, jammy)	5m 12s
compiler (clang-16, ubuntu-22.04, jammy)	5m 11s
compiler (clang-17, ubuntu-22.04, jammy)	5m 7s
	1h 40m 21s

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