perldoc perlrun

    -d:*foo=bar,baz*
         runs the program under the control of a debugging, profiling, or
         tracing module installed as Devel::foo. E.g., -d:DProf executes the
         program using the Devel::DProf profiler. As with the -M flag,
         options may be passed to the Devel::foo package where they will be
         received and interpreted by the Devel::foo::import routine. The
         comma-separated list of options must follow a "=" character. See
         perldebug.