Avoid stacking when grouping by chunked array #10254
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dcherian
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Apr 29, 2025
* main: Fix convert calendar on non-temporal data in datasets (pydata#10268) BinGrouper: reduce indirection (pydata#10270) Fix reduction by subset of grouper dimensions (pydata#10258) Shorten text repr for ``DataTree`` (pydata#10139) Fix benchmarks runners (pydata#10265) Fix infinite recursion when calling `np.fix` (pydata#10248) BinGrouper: Support setting labels when provided with IntervalIndex (pydata#10259) Avoid stacking when grouping by chunked array (pydata#10254) Improve alignment checks (pydata#10251) Update how-to-add-new-backend.rst (pydata#10240) Support extension array indexes (pydata#9671) Switch documentation to pydata-sphinx-theme (pydata#8708) Bump codecov/codecov-action from 5.4.0 to 5.4.2 in the actions group (pydata#10239)
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Now we completely avoid constructing a very large MultiIndex in memory. I'm relying on the existing test suite, but I also manually checked that we never use
self._group_dimorself.group1dwhen grouping by a chunked arraywhats-new.rst