PERF: RangeIndex.append with the same index by mroeschke · Pull Request #57252 · pandas-dev/pandas (original) (raw)

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