PERF: maybe_promote #51592
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PERF: maybe_promote #51592
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| _canonical_nans = { | ||
| np.datetime64: np.datetime64("NaT", "ns"), |
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Will it always be correct to assume "ns"?
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in most contexts it wont matter, but we could probably cook up an example (maybe with object dtype) where it did
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updated so as to retain identical fill_value in object-result cases
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our asv site appears to be done, but locally a lot of the regressions im seeing since 1.5.0 are for cc @phofl |
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thx @jbrockmendel |
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Backport PR #51592: PERF: maybe_promote Co-authored-by: jbrockmendel <jbrockmendel@gmail.com>
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Test runtime for pandas/tests/indexing/multiindex/test_indexing_slow.py decreases from 30s to 14.5s.
See discussion around #39692 (comment)