Merge pull request #132 from cpinte/non_empty_cells #458

Job	Run time
build+test (macos-arm, gfortran, openmp=yes, release=yes)	10m 29s
build+test (macos-arm, gfortran, openmp=yes, release=no)	10m 24s
build+test (macos-arm, gfortran, openmp=no, release=yes)	22m 22s
build+test (macos-arm, gfortran, openmp=no, release=no)	22m 24s
build+test (macos-intel, gfortran, openmp=yes, release=yes)	17m 3s
build+test (macos-intel, gfortran, openmp=yes, release=no)	19m 7s
build+test (macos-intel, gfortran, openmp=no, release=yes)	41m 27s
build+test (macos-intel, gfortran, openmp=no, release=no)	39m 45s
build+test (macos-intel, ifort, openmp=yes, release=yes)	18m 6s
build+test (macos-intel, ifort, openmp=yes, release=no)	15m 56s
build+test (macos-intel, ifort, openmp=no, release=yes)	36m 1s
build+test (macos-intel, ifort, openmp=no, release=no)	33m 2s
build+test (linux, gfortran, openmp=yes, release=yes)	13m 39s
build+test (linux, gfortran, openmp=yes, release=no)	12m 52s
build+test (linux, gfortran, openmp=no, release=yes)	29m 24s
build+test (linux, gfortran, openmp=no, release=no)	28m 2s
build+test (linux, ifort, openmp=yes, release=yes)	20m 13s
build+test (linux, ifort, openmp=yes, release=no)	18m 54s
build+test (linux, ifort, openmp=no, release=yes)	33m 35s
build+test (linux, ifort, openmp=no, release=no)	37m 50s
release	0s
benchmark	0s
	8h 0m 35s

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