Apache Arrow Rust vs InstaWP

arrow-rs is the Rust implementation of Apache Arrow and Parquet, releasing on a visible rhythm: a minor version every few weeks carrying real feature work, one or more release-candidate tags that exist only for the Apache vote, and patch releases off a maintenance branch. The 59.x line has now produced 59.1.0, 59.2.0 with a sans-IO IPC stream encoder and Parquet mask filtering, and a 59.3.0 patch that is entirely backports. The RC tags carry no changelog of their own, so the release body is always the place to read.

The project is taking maintenance branches seriously rather than telling users to move to the next minor. 59.3.0 backports three Parquet reader fixes and a security-audit dependency bump onto a stable line, following the pattern 58.4.0 set with encryption-algorithm and audit backports. Feature work in the minors continues to concentrate on Parquet read paths — mask filtering across skipped pages, sparse page handling — which is where the performance-sensitive users are.

Expect the 59_maintenance branch to keep receiving Parquet reader fixes as they land on main, and the next minor to continue in the same area, since three of the four items in this patch are page and encoding handling in the reader.