libio-async-perl 0.68-1 (amd64 binary) in ubuntu xenial

 IO::Async is a collection of Perl modules that allow programs to perform
 various operations on filehandles asynchronously.
 .
 Typically, a program would use a main IO::Async::Loop which would contain the
 other objects that perform the actual I/O work required by the program. This
 versatile loop supports features like timers and signal handlers through its
 various included subclasses.