I would suggest to file an issue: https://code.google.com/p/go/issues/list https://code.google.com/p/go/issues/list At least, Go team will be aware of your pat

I would suggest to file an issue: https://code.google.com/p/go/issues/list https://code.google.com/p/go/issues/list At least, Go team will be aware of your pathological case and have a chance to speed up it.