pdubroy / pegboard

Two little interpreters

Pegboard

PEG parsing in TypeScript, two ways:

• an AST interpreter (src/tree-walk.ts)
• a switch-based bytecode interpreter (src/switch-interp.ts)

Tests

npm test

Benchmarks

npm run bench:bun (for JSC) or npm run bench:node (V8)

Debugging and profiling

Deopts:

1. Ensure Deopt Explorer is is installed in VSCode.
2. npx tsc && npx dexnode build/scripts/parse.js test/data/jquery-3.2.1.js
3. Open the log file (named something like isolate-0x140078000-55537-v8.log) in Deopt Explorer.