releases

Saturday, March 7, 2026
in releases
2 min read

polars-bio 0.26.0: GTF Support and Smart Tag Type Inference

polars-bio 0.26.0 brings first-class GTF format support, automatic SAM tag type inference for custom/nanopore tags, and critical bug fixes for multi-partition writes and VCF contig metadata.

Saturday, February 14, 2026
in releases, performance
3 min read

polars-bio 0.23.0: Faster Parsing and Python 3.14 Support

polars-bio 0.23.0 is here with significant parsing performance improvements across VCF, BAM, and FASTQ formats, plus first-day support for Python 3.14. This release bumps the underlying datafusion-bio-formats engine to 0.5.0, delivering up to 3.6x faster VCF parsing with no API changes required.