Vapor and its related packages will drop support for Ubuntu 16.04 at the end of the month. Support for Ubuntu 16.04 ended in May 2021 so we are following in line.
Please reach out to us if there are any concerns about these changes.
What kind of performance are you interested in? There are many different aspects such as performance for CPU based work, performance for IO based work (like calling a database or other API), memory performance etc