changes to prevent boxing of variables #510

Job	Run time
Julia pre - windows-latest - auto - push	9m 38s
Julia lts - ubuntu-latest - auto - push	6m 21s
Julia pre - ubuntu-latest - auto - push	8m 23s
Julia lts - macos-latest - auto - push	3m 51s
Julia 1 - windows-latest - auto - push	10m 10s
Julia 1 - macos-latest - auto - push	6m 32s
Julia lts - windows-latest - auto - push	7m 26s
Julia pre - macos-latest - auto - push	8m 28s
Julia 1 - ubuntu-latest - auto - push	9m 29s
	1h 10m 18s

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