The lint workflow only processes a single file at a time. For a large project in which most PRs touch multiple files this can result in the workflow taking up to a hour or longer. People allocating more vcpus to their runner or running self-hosted runners using server grade hardware (e.g. 2+ CPUs with 20+ cores per CPU) can benefit from running multiple lint jobs at the same time similar to passing a -j parameter to clang-tidy.