$iters = shift || 1; # Poor man performance suite, 10000 is OK.
-open(TESTS,'op/re_tests') || open(TESTS,'t/op/re_tests') ||
+open(TESTS,'op/re_tests') || open(TESTS,'t/op/re_tests') || open(TESTS,':op:re_tests') ||
die "Can't open re_tests";
while (<TESTS>) { }