Worked on a targeted API refactor in the rust-lang/rust-analyzer repository, focusing on optimizing duration handling within the codebase. The approach involved introducing new from_days and from_weeks constructors while removing from_mins and from_hours, thereby streamlining the API surface and reducing potential overhead. This change was carefully isolated to non-controversial constructors to minimize risk and support ongoing duration-optimization initiatives. Utilizing Rust and applying API design principles, the work improved the clarity and performance of duration creation paths. The scope was clearly defined, resulting in a focused feature addition that aligns with broader efforts to enhance duration-related operations in the project.