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operator.

=item bad_subs

You can specify an array-ref containing a list of subs not to profile.
There are no items in this list by default.  Be sure to specify the
fully-qualified name - i.e. "Time::HiRes::time" not just "time".

=item sub_filter

The sub_filter option allows you to specify one or more callbacks to
be used to decide whether to profile a subroutine or not.  The callbacks
will recieve two parameters - the package name and the subroutine
name.

For example, to avoid wrapping all upper-case subroutines:

  use Devel::Profiler 
    sub_filter => sub { 
                         my ($pkg, $sub) = @_;
                         return 0 if $sub =~ /^[A-Z_]+$/;
                         return 1;