10BC0 PERF: Index._shallow_copy shares _cache with copies of self by topper-123 · Pull Request #36840 · pandas-dev/pandas · GitHub
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PERF: Index._shallow_copy shares _cache with copies of self #36840

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Merged
jbrockmendel merged 6 commits into from
Oct 6, 2020
Merged

PERF: Index._shallow_copy shares _cache with copies of self #36840

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bc7f46f
PERF: Index.equals when comparing to copies of self
topper-123 Oct 3, 2020
353cae2
refactor _shallow_copy, add GH number
topper-123 Oct 3, 2020
ffa9eee
PERF: share _cache, don't share _id
topper-123 Oct 4, 2020
cff4539
rename tests
topper-123 Oct 4, 2020
c0c9562
fix memory usage test
topper-123 Oct 4, 2020
95698fd
Merge branch 'master' into index_id
jreback Oct 6, 2020
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Merge branch 'master' into index_id
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@jreback
jreback authored Oct 6, 2020
commit 95698fd87a491bd90d145adf73ae9f4a9e08eb80
2 changes: 1 addition & 1 deletion doc/source/whatsnew/v1.2.0.rst
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Expand Up @@ -287,7 +287,7 @@ Performance improvements
- Performance improvement in setting values on a :class:`IntervalArray` (:issue:`36310`)
- The internal index method :meth:`~Index._shallow_copy` now makes the new index and original index share cached attributes,
avoiding creating these again, if created on either. This can speed up operations that depend on creating copies of existing indexes (:issue:`36840`)

- Performance improvement in :meth:`RollingGroupby.count` (:issue:`35625`)

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