Bun vs cnpm

Bun combines a JavaScript runtime, package manager, test runner, and bundler in one binary. It runs JavaScript and TypeScript on JavaScriptCore, with support for Node.js APIs and node_modules. Its npm-compatible package manager supports workspaces, catalogs, overrides, patches, readable lockfiles, private registry authentication, dependency resolution, and offline installation. The test runner includes Jest-compatible expectations, mocks, snapshots, DOM testing, and coverage. For builds, Bun handles TypeScript, JSX, CSS, and HTML for browsers and servers, and includes a development server with hot module reloading and single-file executables. Built-in APIs cover PostgreSQL, MySQL, SQLite, Redis, S3-compatible storage, HTTP, and WebSockets. The project names Next.js, Remix, Nuxt, Astro, SvelteKit, Hono, and Elysia among frameworks that run on Bun. It is MIT-licensed and developed publicly on GitHub. Bun runs on Linux, macOS, and Windows, subject to minimum OS versions and x64 processors with SSE4.2. Install options include an official script, npm, Homebrew, Windows package managers, and Docker. Support and discussion are available through Discord.

cnpm is an npm client for the China mirror of npm. It supports npm commands for package installation and synchronization, and can open package documentation or a Git web URL. Global installation uses `npm install cnpm -g`, and the minimum Node.js version is 20, with LTS recommended. Users can configure a custom registry, registry web address, and user configuration file to create a private-registry npm CLI. cnpm uses npminstall by default, though the original npm installer can be selected at the stated cost of losing the fastest install speed. The mirror is read-only and aims to synchronize with the official service in real time, so write-related operations are excluded. npminstall accepts folders, tarballs, URLs, registry packages, and Git URLs. Its options include ignoring lifecycle scripts, omitting optional dependencies, enforcing registry-only installs, and forbidding specified licenses. It cannot install from shrinkwrap files, and failed installs are best retried after cleaning `node_modules`. The project is MIT licensed and recommends migrating to utoo, described as a modern npm package manager. cnpm runs on Linux, macOS, Windows, and self-hosted environments.