npm Concurrency Test
Test concurrent installs with npm. Also includes Yarn v1 for comparison.
This repo contains 10 apps bootstrapped with Create React App. It does not use workspaces and attempts to run npm install (or yarn install) in all 10 projects in parallel.
Usage
npm
node npm-install.js
Yarn
node yarn-install.js
Between tests you will want to clear out node_modules by running npm run clean.
Expected Results
Yarn v1 has issues with concurrent cache access so you should see errors that look like this:
error An unexpected error occurred: "https://registry.yarnpkg.com/tailwindcss/-/tailwindcss-3.0.15.tgz: ENOENT: no such file or directory, open '/Users/iansu/Library/Caches/Yarn/v6/npm-tailwindcss-3.0.15-e4db219771eb7678a3bfd97b3f6c8fe20be0a410-integrity/node_modules/tailwindcss/.yarn-tarball.tgz'".When running with npm (tested with npm 8.3.0) there should be no errors.