Coroutines generally imply some sort of magic to me. I would just go straight to tbb and concurrent_unordered_map! The challenge of parallelism does not come

Coroutines generally imply some sort of magic to me. I would just go straight to tbb and concurrent_unordered_map! The challenge of parallelism does not come from how to make things parallel, but how you share memory: How you avoid cache misses, make sure threads don't trample each other and design the higher level abstraction so that all layers can benefit from the performance without suffering turnaround problems. My challenge right now is how do I make the JVM fast on native memory: 1) Rewrite my own JVM. 2) Use the buffer and offset structure Oracle still has but has deprecated and is encouraging people to not use. We need Java/C# (already has it but is terrible to write native/VM code for?) with bottlenecks at native performance and one way or the other somebody is going to have to write it?