I want to say something in meaning of "You've made the record at?/in? 2 seconds" - basically a user answers questions and time to answer is measured. After each question, I want to say if a new record was made and what's the record.
But to be honest neither at/in or other preposition seems to be right and I don't know how an English speaking person would say this. (And something like 'you've made a record, you've answered in X seconds' seem to me a bit awkward.)