From the changelog[1]
- Performance: added support for filtering incoming packets at the kernel level using BPF (if available on target platform)
- Various minor fixes and improvements.
[1] https://github.com/oleg-derevenetz/bwping/releases/tag/RELEASE_2.1
Tested on Poudriere. 'portlint -AC' is fine.
Submitted by Oleg Derevenetz <oleg.derevenetz@gmail.com> (maintainer) in PR 250016