The long way round

Sample-accurate or nothing. A buffer callback gives you 128 frames and about 2.6 milliseconds. Miss it and a room full of people hears the failure. It taught me that latency is not a metric, it is a feeling — and that the only honest way to know whether a system is fast enough is to stand in front of the people using it.

The room is the compiler. Ten thousand people are your test suite and they return a verdict in under a second. No stack trace, no retry, no rolling it back on Monday. I have never shipped to a more honest production environment, and everything I believe about feedback loops I learned standing behind a rig watching a crowd decide.

16.6 milliseconds, forever. A game loop is the same discipline as an audio callback, only now the deadline is visible and every player is watching it. I stopped thinking about performance as an optimisation pass and started treating it as a contract — one you sign with the person holding the controller and cannot renegotiate later.

Space became a datatype. Turning a building that does not exist yet into somewhere a buyer can walk through rewired how I think about interfaces entirely. Every UI I have designed since is a room I am asking someone to stand in, and the question is always the same: do they know where they are, and do they know where the door is.

The accounting degree finally cashed in. Eleven years after walking away from a ledger I was modelling cash flow again, except now it was a system that tells someone whether they can afford next month. Nothing I had learned turned out to be wasted. It was just early, and I had spent a decade acquiring the second half of the sentence.

Everything is a pipeline. A creative asset arrives as one file and has to leave as forty, each cut to a different specification, each with a transmission slot that will not move. It is the same real-time discipline wearing a different hat — the deadline is an air date rather than a buffer callback, and it is every bit as unforgiving.

Back to the callback. An agent loop is a buffer callback with a longer deadline and far worse determinism. Fifteen years of chasing real-time systems turns out to have been preparation for this exact problem. I am still doing the only thing I have ever done: trying to make the machine respond in time, and caring how it feels when it does.