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[3.0] Improve generator performance #1345

Job	Run time
Test (win-x64, windows-latest, win-x64)	3m 43s
Test (osx-arm64, macos-latest, osx-arm64)	2m 14s
Build	4m 38s
Test (linux-x64, ubuntu-22.04, linux-x64)	2m 41s
Report Coverage	32s
Release	0s
	13m 48s

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