[WIP} Stacked permuted dense #451

Job	Run time
build (windows-latest, Release)	10m 25s
build (windows-latest, Debug)	9m 1s
build (ubuntu-latest, Release)	39s
build (macos-latest, Debug)	18s
build (ubuntu-latest, Debug)	20s
build (macos-latest, Release)	21s
	21m 4s

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