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PERF: Avoid MultiIndex conversion for IntervalIndex methods #24813

jschendel opened this issue Jan 17, 2019 · 1 comment


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commented Jan 17, 2019

There are a few IntervalIndex methods that convert to a MultiIndex as an intermediate step, and then use the associated MultiIndex method to compute the result. This likely introduces overhead that could be avoided via a more direct IntervalIndex implementation.

Methods that currently require a MultiIndex conversion:

  • IntervalIndex.is_monotonic (#25820)
  • IntervalIndex.is_monotonic_increasing (#25820)
  • IntervalIndex.is_monotonic_decreasing (#25820)
  • IntervalIndex.is_unique (#26391)
  • IntervalIndex._get_loc_only_exact_matches
  • IntervalIndex.union
  • IntervalIndex.intersection (#26225)
  • IntervalIndex.difference
  • IntervalIndex.symmetric_difference

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commented Jan 20, 2019

@jschendel I will look into this.

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