Heuristic Sampling Improvements #593

Job	Run time
test (3.8, ubuntu-latest, test)	6m 41s
test (3.8, ubuntu-latest, test-full)	8m 11s
test (3.8, windows-latest, test)	7m 29s
test (3.8, windows-latest, test-full)	9m 30s
test (3.9, ubuntu-latest, test)	6m 34s
test (3.9, ubuntu-latest, test-full)	8m 24s
test (3.9, windows-latest, test)	9m 0s
test (3.9, windows-latest, test-full)	9m 56s
test (3.10, ubuntu-latest, test)	6m 36s
test (3.10, ubuntu-latest, test-full)	8m 24s
test (3.10, windows-latest, test)	9m 27s
test (3.10, windows-latest, test-full)	10m 5s
test (3.11, ubuntu-latest, test)	6m 6s
test (3.11, ubuntu-latest, test-full)	8m 16s
test (3.11, windows-latest, test)	8m 31s
test (3.11, windows-latest, test-full)	9m 52s
test (3.12, ubuntu-latest, test)	6m 46s
test (3.12, ubuntu-latest, test-full)	17m 2s
test (3.12, windows-latest, test)	8m 3s
test (3.12, windows-latest, test-full)	13m 45s
check-format / check	13s
	2h 58m 51s

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