Polars 2.0 mengubah default LazyFrame ke streaming engine
Oleh Zai · Let's Make It Easy
Dipublikasikan 2026-09-03
The upgrade is intentionally framed as boring: better defaults, but with a behavioral change that data pipelines need to test.
The upgrade is intentionally framed as boring: better defaults, but with a behavioral change that data pipelines need to test.
Apa yang dilaporkan
Polars published the first release candidate for Polars 2.0 on 2 September 2026.
Polars says LazyFrame queries will use the streaming engine by default; it expects aggregate workloads to be easily 5x faster.
Detail penting
Streaming defaults may change observable row order for some joins, group_by, and unpivot operations unless order is requested.
Catatan dan batas
The 5x figure is Polars’ aggregate expectation, not a guarantee for every workload; this is a pre-release candidate and the final release was described as landing in the following weeks.