[sphink]

I agree. If you accept the reasonable premise that incremental GC trades worse throughput for better latency, then splay-latency rewards low throughput.

That isn't as awful as it sounds, it's just that there's nothing in the benchmark that tells the JS engine that penalizing throughput is the right thing to do. It needs some kind of marker that we can agree means "even though it's the wrong thing to do given just the code that you're seeing, pretend like this is running in an environment where you should prioritize throughput below latency between these semi-arbitrary points." We are discussing perhaps treating Date.now or window.performance.now as meaning that, because if you're measuring the jitter between things, you'll be grabbing the current time at exactly those points where you're mimicking ending one turn and starting the next. But that's still not really correct, because you're also asserting that there would be zero idle time in between turns, which is generally not true in a real application.

It's a mess.