[Rust] Use slices for iterating primitive arrays #18428
Description
Iterating slices instead of indexes seems to improve performance of non-simd arithmetic operations.
This adds a new method raw_values_slice to PrimitiveArray (so named to pun off of the raw_values function which returns a pointer). A few of the functions in PrimitiveArray rely on the caller for safety guarantees (bounds-checks for value_slice, value), so should probably be unsafe? But they are used widely, so I thought it simpler to start by adding a safer alternative...
Reporter: Tyrel Rink / @tyrelr
Assignee: Tyrel Rink / @tyrelr
Related issues:
PRs and other links:
Note: This issue was originally created as ARROW-10989. Please see the migration documentation for further details.