PERF: Avoid copy in DataFrame._reduce corner cases #42232
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can you point to the benchmarks which change ? |
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Not aimed at any benchmarks in particular, i just have a note to self to avoid a copy here. |
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This implements BlockManager._get_data_subset (which ArrayManager already has) to avoid making a copy in a
DataFrame.__getitem__usage inside DataFrame._reduce.This path is deprecated so this snippet will be removed in 2.0.