Container Runtimes and WasmEdge benchmarking on Arm
community.arm.com
community.arm.com
Also it is no surprising that a container cannot beat a sandboxed programming platform that wasm is. I do not know if there is some mode in Java that could be comparable.
Boot up time also tends to be irrelevant since the true slowdown comes from initializing other dependencies anyways.
Wasm looks relevant for existing apps in C++ that you wish to run from a web browser.
That's a medium difficulty then. Kata isn't a great development environment.