You’ll find that quite a few things happen in real-time — or is it “real time”? To hyphen or not to hyphen: that is the question. If you find that you’re uncertain, you aren’t alone.
The correct way to spell “real time,” with or without a hyphen, depends on your intended meaning and syntax. If you are using “real time” as a noun or as part of a noun phrase, you likely do not need a hyphen. A hyphen is only necessary (real-time) if you are using the term as a compound adjective and, in that case, the purpose is for added clarity.