Module polars_core::doc::changelog::v0_7

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Changelog v0.7

  • More group by aggregations:
    • n_unique
    • quantile
    • median
    • last
    • group indexes
    • agg (combined aggregations)
  • explode operation
  • melt operation
  • df! macro
  • Rem trait implemented for Series and ChunkedArrays
  • ChunkedArrays broadcasting arithmetic
  • ChunkedArray/Series zip_with operation
  • ChunkedArray/Series expand_at_index operation
  • laziness api initiated.
    • Predicate pushdown optimizer
    • Projection pushdown optimizer
    • Type coercion optimizer
    • Selection (filter, where clause)
    • Projection (select foo from bar)
    • Aggregation (groupby)
      • all eager aggregations supported
    • Joins
    • WithColumn operation
    • DSL
      • (col, lit, lt, lt_eq, alias, etc.)
      • arithmetic
      • when / then /otherwise
  • 1.3-1.7 performance increase of filter
  • ChunkedArray/ Series creation speedup: No nulls: 10X speedup, Nulls: 1.1-2.2x speedup.