kuasar

Here are some projects that run docker containers on top of micro/lightweight VMs: - https://github.com/firecracker-microvm/firecracker-container... - https://github.com/kuasar-io/kuasar - https://github.com/kata-containers/kata-containers - https://github.com/QuarkContainer/Quark - https://github.com/google/gvisor - https://github.com/containers/libkrun

Right now most early examples alas boot a container with a wasm runtime for each wasm instance, which is a sad waste. The whole advantage of wasm should be very lightweight low overhead wasm runtime instances atop a common wasm process. Having a process or container for each instance loses a ton of the benefit, makes it not much better than a regular container. Thankfully there is work like the Containerd Sandbox API which enables new architectures like this. https://github.com/containerd/containerd/issues/4131 It's still being used to spawn a wasm processes per instance for now, but container runtime project Kuasar is already using the Sandbox API to save significant resources, and has already chimed in in comments on HN to express a desire to have shared-process/multi-wasm-instamxe runtimes, which could indeed allow sub ms spawning that