Ubuntu 25.10’s Rust Coreutils Transition Has Uncovered Performance Shortcomings
Ubuntu 25.10’s Rust Coreutils Transition Has Uncovered Performance Shortcomings Written by Michael Larabel in Ubuntu on 15 September 2025 at 08:00 AM EDT. 51 Comments Ubuntu 25.10’s transition to using Rust Coreutils in place of GNU Coreutils has uncovered a few performance issues so far with the Rust version being slower than the C-based GNU Coreutils. Fortunately there still are a few weeks to go until Ubuntu 25.10 releases as stable and upstream developers are working to address these performance gaps. The recent Rust Coreutils 0.2.2 release with faster base64 turned out to stem from an Ubuntu developer pointing out the performance disparity. That base64 issue was raised in this bug report and quickly resolved in Rust Coreutils to end up providing even better performance than GNU…
