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[3.0] Improve generator performance #1346

Job	Run time
Build	5m 23s
Test (linux-x64, ubuntu-22.04, linux-x64)	2m 18s
Test (osx-arm64, macos-latest, osx-arm64)	2m 24s
Test (win-x64, windows-latest, win-x64)	4m 14s
Report Coverage	35s
Release	0s
	14m 54s

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