Add reserve method for owned arrays#1268
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bluss merged 9 commits intorust-ndarray:masterfrom Apr 6, 2024
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Mar 10, 2024
Testing when the allocation to first element offset is nonzero.
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Rebased, resolved conflict, added test for nonzero alloc to first element pointer |
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Thanks a lot for this |
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| pub fn reserve(&mut self, axis: Axis, additional: usize) -> Result<(), ShapeError> | ||
| where D: RemoveAxis | ||
| { | ||
| debug_assert!(axis.index() < self.ndim()); |
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Why was the branch that returned early on additional == 0 removed?
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No reason to hold up the PR on this question I think 🙂
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Why was the branch that returned early on additional == 0 removed?
I think that was because it was faster (at least on my machine) without it, but it's been a while so could be worth re-testing with it in.
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This PR adds an
array.reserve(axis, additional)method for use when appending multiple times to an array.It abstracts over the code in
appendthat was callingOwnedRepr::reservein order to expose it.Benchmark results (appending 100 times to an empty array):
Note I'm new to the crate so I may have missed something, but happy to iterate if there's more to do.