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PERF: RangeIndex.append with the same index #57252

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Merged
merged 5 commits into from
Feb 9, 2024
Merged

PERF: RangeIndex.append with the same index #57252

merged 5 commits into from
Feb 9, 2024

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mroeschke
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In [1]: import pandas as pd, numpy as np

In [2]: idx = pd.RangeIndex(1000)

In [3]: %timeit idx.append([idx] * 100_000)
362 ms ± 4.39 ms per loop (mean ± std. dev. of 7 runs, 1 loop each)  # main
342 ms ± 4.07 ms per loop (mean ± std. dev. of 7 runs, 1 loop each)  # pr

@mroeschke mroeschke added Performance Memory or execution speed performance Index Related to the Index class or subclasses labels Feb 4, 2024
@mroeschke mroeschke added this to the 3.0 milestone Feb 6, 2024
@phofl phofl merged commit 1564cf8 into pandas-dev:main Feb 9, 2024
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phofl commented Feb 9, 2024

thx @mroeschke

@mroeschke mroeschke deleted the ref/range/append branch February 9, 2024 21:31
pmhatre1 pushed a commit to pmhatre1/pandas-pmhatre1 that referenced this pull request May 7, 2024
@mroeschke @pmhatre1
PERF: RangeIndex.append with the same index (pandas-dev#57252)
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@phofl phofl phofl approved these changes

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