Polars vs pandas for Python data engineering: why Polars is faster (lazy evaluation, columnar execution, true parallelism), when to switch, and the best resources to learn it.
Polars' user guide is well-written. The sections on lazy evaluation and expressions explain the design choices that make it fast.
Side-by-side pandas vs. Polars translations of common operations. The fastest way to learn Polars if you already know pandas.
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