https://nodejs.org/api/test.html https://nodejs.org/api/typescript.html Run TS nvm use 22 node --experimental-strip-types index.ts Run tests node --test --experimental-strip-types --experimental-test-coverage article Part 1: https://medium.com/@serhiisamoilenko/part-1-mastering-utf-8-file-parsing-in-node-js-22-with-built-in-typescript-and-test-runner-889892489931 Part 2: https://medium.com/@serhiisamoilenko/speeding-up-file-parsing-with-multi-threading-in-nodejs-and-typescript-9e91728cf607