Web49

Web49 is a WebAssembly toolkit and interpreter.

Try the first release! v0.0.1

Web49 contains a few tools for working with WebAssembly.

• interpreters
  • miniwasm
    • fast wasm interpreter
      • uses technology from minivm
    • supports multiple wasm formats
      • wasm binary format: ~100% complete
      • wasm text format: ~95% complete
      • wasm spect test: ~75% complete
    • includes a custom WASI implementation
  • raywasm
    • wasm interpreter based on miniwasm
• wasm binary tools rewrite
  • much simpler than WABT's tools
  • much smaller than Binaryen's tools
  • wat2wasm
    • convert wasm text into wasm binary
  • wasm2wat
    • generates nearly identical wat as binaryen or wabt
    • turn wasm binary into wasm text
    • supports all of wasm 1.0 and some extensions
  • wasm2wasm
    • shrink numbers in wasm files generated by llvm
      • saves 0-4 bytes per 32 bit number
      • saves 0-10 bytes per 64 bit number
    • round trip parse and reemit

Benchmarks

Benchmarks performed by wasm3 and Web49's miniwasm. Ran on an 2020 Macbook Air (M1 + 8GiB ram) using bench.py.

All Benchmarks compiled with: emcc -O2

One can also view results run on github actions One can run the benchmarks for themselves.

• python3
  • with pip
• emcc
• wasm3
• make
  • tested with GNUMake
  • works with BSDMake too
• and a C compiler
  • gcc/clang/tcc works
  • msvc would work if someone rewrites two macros
    • #define NEXT() break
    • #define LABEL(X) case X:
    • probably a couple others

git clone https://github.com/fastvm/web49
cd web49
make CC=gcc # gcc is fastest in my tests
python3 -m pip install matplotlib
python3 bench.py

Binary Trees

Coremark

Fannkuch Redux

Fibonacci on ints32_t

Mandelbrot with SIMD

Mandelbrot without SIMD

Nbody

Executing A Trap