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    ## "Devel" - extra checking code
    local 
...

    if (($mp->{optimize} and $exec||=$exec++) || 
                                          param_checks() == subsequent
+_call) {

sub bar($) {...}
 # and the calling routines would use either...
[1,2,3,4]
 # or
{p1=>1, p2=>2...}