refactor: iterators #128

Job	Run time
Julia 1.6 - macos-13 - x64	1h 59m 14s
Julia 1.6 - ubuntu-latest - x64	17m 14s
Julia 1.10 - macos-13 - x64	1h 43m 32s
Julia 1.10 - ubuntu-latest - x64	17m 11s
Julia nightly - macos-13 - x64	1h 42m 23s
Julia nightly - ubuntu-latest - x64	17m 59s
Julia 1.10 - macos-14 - aarch64	6h 0m 21s
Julia nightly - macos-14 - aarch64	6h 0m 18s
	18h 18m 12s

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