Rust

IArray: from_iter optimization for empty arrays #124

Job	Run time
test (ubuntu-latest, stable, 1.9.3)	43s
test (ubuntu-latest, stable, latest)	42s
test (ubuntu-latest, 1.64.0, 1.9.3)	3m 55s
test (ubuntu-latest, 1.64.0, latest)	3m 52s
test (windows-latest, stable, 1.9.3)	1m 36s
test (windows-latest, stable, latest)	1m 17s
test (windows-latest, 1.64.0, 1.9.3)	3m 56s
test (windows-latest, 1.64.0, latest)	3m 56s
test (macos-latest, stable, 1.9.3)	53s
test (macos-latest, stable, latest)	50s
test (macos-latest, 1.64.0, 1.9.3)	4m 10s
test (macos-latest, 1.64.0, latest)	3m 57s
	29m 47s

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