Module polars::doc::changelog::v0_10_0_11

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Changelog v0.10 / v0.11

  • CSV Read IO

    • Parallel csv reader

  • Sample DataFrames/ Series

  • Performance increase in take kernel

  • Performance increase in ChunkedArray builders

  • Join operation on multiple columns.

  • ~3.5 x performance increase in groupby operations (measured on db-benchmark), due to embarrassingly parallel grouping and better branch prediction (tight loops).

  • Performance increase on join operation due to better branch prediction.

  • Categorical datatype and global string cache (BETA).

  • Lazy

    • Lot’s of bug fixes in optimizer.
    • Parallel execution of Physical plan
    • Partition window function
    • More simplify expression optimizations.
    • Caching
    • Alpha release of Aggregate pushdown optimization.

  • Start of general Object type in ChunkedArray/DataFrames/Series