Return of the threaded detection #304

Job	Run time
test (1.6, ubuntu-latest, x64, 1)	8m 14s
test (1.6, ubuntu-latest, x64, 2)	8m 9s
test (1.6, macOS-latest, x64, 1)	12m 45s
test (1.6, macOS-latest, x64, 2)	12m 9s
test (1.6, windows-latest, x64, 1)	21m 32s
test (1.6, windows-latest, x64, 2)	24m 1s
test (1, ubuntu-latest, x64, 1)	8m 5s
test (1, ubuntu-latest, x64, 2)	7m 52s
test (1, macOS-latest, x64, 1)	11m 56s
test (1, macOS-latest, x64, 2)	11m 24s
test (1, windows-latest, x64, 1)	12m 17s
test (1, windows-latest, x64, 2)	11m 39s
test (1.11-nightly, ubuntu-latest, x64, 1)	8m 14s
test (1.11-nightly, ubuntu-latest, x64, 2)	7m 59s
test (1.11-nightly, macOS-latest, x64, 1)	11m 57s
test (1.11-nightly, macOS-latest, x64, 2)	11m 46s
test (1.11-nightly, windows-latest, x64, 1)	12m 16s
test (1.11-nightly, windows-latest, x64, 2)	12m 0s
test (nightly, ubuntu-latest, x64, 1)	8m 7s
test (nightly, ubuntu-latest, x64, 2)	7m 54s
test (nightly, macOS-latest, x64, 1)	12m 9s
test (nightly, macOS-latest, x64, 2)	12m 3s
test (nightly, windows-latest, x64, 1)	12m 30s
test (nightly, windows-latest, x64, 2)	11m 46s
	4h 38m 44s

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