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    else {
        $subcode = "sub { for (1 .. $n) { local \$_; package $pack; $c;} }";
        $subref  = _doeval($subcode);
        $confirmref = _doeval("sub { package $pack; $c; }");
    }
    croak "runloop unable to compile '$c': $@\ncode: $subcode\n" if $@;
    print STDERR "runloop $n '$subcode'\n" if $Benchmark::Debug;

    push @Benchmark::Confirm::CONFIRMS, $confirmref->();

    # Wait for the user timer to tick.  This makes the error range more like 
    # -0.01, +0.  If we don't wait, then it's more like -0.01, +0.01.  This
    # may not seem important, but it significantly reduces the chances of
    # getting a too low initial $n in the initial, 'find the minimum' loop
    # in &countit.  This, in turn, can reduce the number of calls to
    # &runloop a lot, and thus reduce additive errors.
    my $tbase = Benchmark->new(0)->[1];
    while ( ( $t0 = Benchmark->new(0) )->[1] == $tbase ) {} ;
    $subref->();
    $t1 = Benchmark->new($n);
    $td = &timediff($t1, $t0);