Port usage of uninitialized to build_uninit #287
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bluss commented May 13, 2021
| Zip::indexed(&mut a).for_each(|(i, j), elt| { | ||
| if i > j { *elt = A::zero() } | ||
| }); | ||
| a |
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This PR has an inefficiency here since zero elements are overwritten after copying (not benchmarked, in some cases probably faster/just as fast because the indexed iterator is slow).
Codecov Report
@@ Coverage Diff @@ ## master #287 +/- ## ======================================= Coverage 89.01% 89.01% ======================================= Files 71 71 Lines 3577 3578 +1 ======================================= + Hits 3184 3185 +1 Misses 393 393
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build_uninit is necessary for abstracting over any kind of owned array. The version of take_slice_upper is still inefficient in one way (overwriting after copying), but could likely still be an improvement upon the previous version.
jturner314 approved these changes May 27, 2021
| I merged this because it looks good to me, we really need to release a new version of |
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build_uninit, is necessary for abstracting over any kind of owned array here.
Fixes #277
Requires ndarray 0.15.2