Comment by bob1029

I've achieved GC timing that is good enough for real-time competitive game hosting using .NET6+. Worst case over 4 hours of load testing was an 8ms spike. Average 1-2ms.

The magic trick is to intentionally collect as often as reasonably possible (i.e. at batch/frame/tick processing boundaries) and avoid using sophisticated GC schemes that involve multiple threads or asynchrony.

Oh, and obviously you need to minimize allocations throughout or it won't matter.