16:20 It's, like, why is load testing so hard. But the the crux of it, I think, is just that, like, it has to match what your actual behavior is, and that also you don't know you you don't know what the actual workload is gonna be until you've deployed it into production. You can guess how people are gonna use it, but you you can't get that real workload until it's in production. So there's some mismatch always there, but, like, ultimately, you have to try to simulate in an ideal case, simulate, like, end to end for the entire system, what is the workload that users are gonna put on it. Because if you test different services in isolation, you're not capturing interplay and, like, nonlinear interactions between the different components of the system.