Oh wait, we get to talk about Hyperlight in public now?
Hyperlight is a Hypervisor by Microsoft which is specifically designed with WebAssembly in mind. Booting VMs takes microseconds (boots 2000 VMs in 1.7s). Uses minimal memory (2000 VMs use 3.1GB of memory). And has response times on par with regular processes.
Imo it’s one of the coolest pieces of infrastructure being worked on in Azure. Mark Russinovich (Azure CTO) shows it in action here: