Various performance baselines for typescript-eslint.

You'll need hyperfine installed locally, such as with brew install hyperfine or winget install hyperfine. See sharkdp/hyperfine#installation.

npm install
npm generate
npm measure

The caseEntries values in src/data.ts can be modified to test:

• files: roughly how many generated files should be linted
• layout: what rough shape of imports those files exhibit:
  • "even": a single root-level index.ts importing from roughly an even triangle shape of files
  • "references": a single root-level tsconfig.json with project references to a few projects
  • "wide": one root-level index.ts importing from all files in the project
• singleRun: whether to enable single-run inference as a performance boost
• types: whether to use parserOptions.project or parserOptions.projectService for typed linting

Right now, parserOptions.project outperforms parserOptions.projectService. This is a performance issue and we are investigating it as a critical bug for v8.

┌───────┬──────────────────────┬──────────────────────┬──────────────────────┬──────────────────────┐
│ files │ project (even)       │ project (references) │ service (even)       │ service (references) │
┼───────┼──────────────────────┼──────────────────────┼──────────────────────┼──────────────────────┤
│ 128   │ '1.149 s ±  0.030 s' │ '1.135 s ±  0.008 s' │ '1.178 s ±  0.010 s' │ '1.736 s ±  0.012 s' │
│ 512   │ '1.636 s ±  0.009 s' │ '1.656 s ±  0.004 s' │ '1.895 s ±  0.007 s' │ '2.613 s ±  0.020 s' │
│ 1024  │ '2.353 s ±  0.013 s' │ '2.399 s ±  0.016 s' │ '3.130 s ±  0.017 s' │ '4.034 s ±  0.061 s' │
┴───────┴──────────────────────┴──────────────────────┴──────────────────────┴──────────────────────┘

Josh Goldberg ✨ 💻 🖋 📖 🤔 🚇 🚧 📆 🔧