gen threshold fixed #90

Job	Run time
linux-build-test (3.9)	4m 2s
macos-build-test (3.11, macos-latest)	3m 24s
linux-build-test (3.10)	4m 0s
windows-build-test (3.9)	9m 43s
macos-build-test (3.11, macos-latest-large)	4m 10s
windows-build-test (3.10)	9m 57s
linux-build-test (3.11)	3m 58s
macos-build-test (3.12, macos-latest)	3m 19s
windows-build-test (3.11)	10m 4s
linux-build-test (3.12)	4m 17s
macos-build-test (3.12, macos-latest-large)	4m 11s
windows-build-test (3.12)	9m 44s
cargo-build-test	4m 53s
pypi-publish	38s
	1h 16m 20s

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