Do not load primitive array #579

Job	Run time
rust_ci (ubuntu-latest, beta)	1m 33s
rust_ci (macos-latest, stable)	1m 49s
rust_ci (ubuntu-latest, stable)	1m 29s
rust_ci (macos-latest, beta)	1m 58s
rust_ci (windows-latest, stable)	5m 22s
rust_ci (windows-latest, beta)	3m 30s
	15m 41s

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