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Copy file name to clipboardExpand all lines: doc/source/whatsnew/v3.0.0.rst
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@@ -667,7 +667,7 @@ Performance improvements
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- Performance improvement in :meth:`DataFrame.stack` when using ``future_stack=True`` and the DataFrame does not have a :class:`MultiIndex` (:issue:`58391`)
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- Performance improvement in :meth:`DataFrame.where` when ``cond`` is a :class:`DataFrame` with many columns (:issue:`61010`)
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- Performance improvement in :meth:`to_hdf` avoid unnecessary reopenings of the HDF5 file to speedup data addition to files with a very large number of groups . (:issue:`58248`)
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- Performance improvement in ``DataFrame.plot(kind="line")``: very wide DataFrames (more than 200 columns) are now rendered with a single :class:`matplotlib.collections.LineCollection` instead of one ``Line2D`` per column, reducing draw time by roughly 7 × on a 2000-column frame. (:issue:`61532`)
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- Performance improvement in ``DataFrame.plot(kind="line")``: very wide DataFrames (more than 200 columns) are now rendered with a single :class:`matplotlib.collections.LineCollection` instead of one ``Line2D`` per column, reducing draw time by roughly 5x on a 2000-column frame. (:issue:`61532`)
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- Performance improvement in ``DataFrameGroupBy.__len__`` and ``SeriesGroupBy.__len__`` (:issue:`57595`)
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- Performance improvement in indexing operations for string dtypes (:issue:`56997`)
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- Performance improvement in unary methods on a :class:`RangeIndex` returning a :class:`RangeIndex` instead of a :class:`Index` when possible. (:issue:`57825`)
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