Some computing notes

WebAssembly (Wasm)

• Fast in-place interpreter
  • Fast interpreter technique for Wasm; no IR. For purposes of this page, I value this more for a way to build a small, IR-less interpreter than for generating an interpreter using a macro assembler.
• Wasm-R3
  • Instrument Wasm programs to track input/output; minimize replay traces up to 99%. Injects Wasm code, but could also be done as a wrapper module probably. Quasi-journaling?
• wizer
  • Start a Wasm program, pause it, and quiesce its entire state into a new Wasm module with a new entrypoint
• polywasm
  • Compile wasm to JS. Bundled, 2500LOC JS for the compiler. Little WASI stub could be ~100LOC more.
• memfs
  • In-memory filesystem in C that can be compiled to Wasm
• ASC
  • Seltzer’s group at Harvard build some wild stuff. Wonder if it would be easier with a smaller/more introspectable machine like Wasm.

Little Wasms

• Wasmbox
• tiny-wasm-runtime
• winter
• cjwasm?
• baseline wasm compiler
• Whose baseline compiler is it anyway?

Other

• Hermit
• keyvm
• rarvm