lib:less
See the current Perl documentation for lib:less.
Here is our local, out-dated (pre-5.6) version:
less - perl pragma to request less of something from the compiler
use less; # unimplemented
Currently unimplemented, this may someday be a compiler directive to make certain trade-offs, such as perhaps
use less 'memory'; use less 'CPU'; use less 'fat';