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Bodo 2020.10 Release (Date: 10/20/2020)

This release includes many new features, bug fixes and performance improvements. Overall, 117 code patches were merged since the last release.

New Features and Improvements

  • Initial support for Python classes using bodo.jitclass decorator.

  • Scikit-learn:
        Initial support for these scikit-learn classes:

    :   -   `sklearn.linear_model.SGDClassifier`
        -   `sklearn.linear_model.SGDRegressor`
        -   `sklearn.cluster.KMeans`

        For more information please refer to the documentation
        [here](https://docs.bodo.ai/latest/source/sklearn.html)

-   Improved scaling of `RandomForestClassifier` training

  • Memory management and memory consumption improvements

  • Improvements for User-defined functions (UDFs):
    • Compilation errors are now clearly shown for UDFs
    • Support more complex UDFs (by running a full compiler pipeline)
    • Support passing keyword arguments to UDF in DataFrame.apply() and Series.apply()
    • Support much wider range of UDF types in groupby.agg
  • Connectors:
    • Improved connector error handling
    • Improved performance of pd.read_csv (further improvements in next release)
    • pd.read_parquet supports column containing all NA (null) values

  • Caching: for Bodo functions that receive parquet file names as string arguments, the cache will now be reused when file name arguments differ but have the same parquet dataset type (schema).

  • Significantly improved the performance of merge/join operations in some cases

  • Support for loops over dataframe columns by automatic loop unrolling

  • Support using global dataframe/array values inside jit functions

  • Performance optimization for the series.str.split().explode() pattern

  • Pandas coverage:
    • Support setting df.columns and df.index
    • Support setting values in Categorical arrays
    • series.str.split: added support for regular expression and n parameter
    • Series.replace support for more array types
    • Support pd.series.dt.quarter
    • Support series.str.slice_replace
    • Support series.str.repeat
    • Improved support for df.pivot_table and pd.crosstab
    • Support for Series.notnull
    • Support integer label indexing for Dataframes and Series with RangeIndex
    • Support setting None and Optional values for most arrays
  • NumPy coverage:
    • Support for np.union1d
    • np.where, np.unique, np.sort, np.repeat: support for Series and most array types
    • Support np.argmax with axis=1
    • Support for np.min, np.max, min, max, np.sum, sum, np.prod on nullable arrays
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