## High-Performance Data Processing with Polars: A KDnuggets Cheat Sheet Polars is a DataFrame library written in Rust on the Apache Arrow memory format, and the speed comes less from the language than from the model. The model? Describe your work as expressions, and the Polars query engine plans them out. Most people arrive at Polars after a specific kind of frustration: they have a dataset that fits on disk but not in memory, or they try to perform a transformation that runs on one core while the other fifteen sit idle. Polars is a DataFrame library written in Rust on the Apache Arrow…