Return of the threaded detection #303

Job	Run time
test (1.6, ubuntu-latest, x64, 1)	8m 29s
test (1.6, ubuntu-latest, x64, 2)	8m 13s
test (1.6, macOS-latest, x64, 1)	14m 56s
test (1.6, macOS-latest, x64, 2)	15m 8s
test (1.6, windows-latest, x64, 1)	24m 16s
test (1.6, windows-latest, x64, 2)	23m 50s
test (1, ubuntu-latest, x64, 1)	8m 22s
test (1, ubuntu-latest, x64, 2)	7m 58s
test (1, macOS-latest, x64, 1)	14m 9s
test (1, macOS-latest, x64, 2)	14m 7s
test (1, windows-latest, x64, 1)	12m 37s
test (1, windows-latest, x64, 2)	12m 19s
test (1.11-nightly, ubuntu-latest, x64, 1)	8m 26s
test (1.11-nightly, ubuntu-latest, x64, 2)	8m 7s
test (1.11-nightly, macOS-latest, x64, 1)	14m 16s
test (1.11-nightly, macOS-latest, x64, 2)	13m 57s
test (1.11-nightly, windows-latest, x64, 1)	12m 37s
test (1.11-nightly, windows-latest, x64, 2)	12m 12s
test (nightly, ubuntu-latest, x64, 1)	8m 26s
test (nightly, ubuntu-latest, x64, 2)	8m 17s
test (nightly, macOS-latest, x64, 1)	14m 3s
test (nightly, macOS-latest, x64, 2)	14m 21s
test (nightly, windows-latest, x64, 1)	12m 44s
test (nightly, windows-latest, x64, 2)	12m 2s
	5h 3m 52s

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