Deno 2.6 adds the dx command as an npx‑compatible runner for npm and JSR binaries, tightens security with the new deno audit command and fine‑grained permission flags, speeds up TypeScript checking via the Go‑based tsgo, and improves Node.js compatibility with built‑in @types/node and a --require flag.
Bun 1.2 delivers its biggest upgrade yet, boosting Node.js compatibility above 90% for core modules, adding built‑in PostgreSQL and native S3 support that outperforms the AWS SDK, switching to a readable lock file for faster installs, enhancing testing tools, and improving HTTP/2, filesystem, JSON and Windows performance while targeting remaining compatibility gaps.
Version 1.2 of the Bun runtime introduces five significant enhancements—including improved Node.js compatibility, HTML import that replaces the entire frontend toolchain, native S3 object handling, a fast Promise‑based Postgres driver, and a text‑based lock file—positioning Bun as a comprehensive, cloud‑first JavaScript ecosystem.
Both Deno 2 and Bun, the newly released JavaScript runtimes, can function as independent package managers, offering compatibility with Node.js and npm, support for various dependency sources, performance optimizations, and unique commands such as deno install, add, remove, and Bun’s workspace and caching features.
Deno 2.0, the latest production release of the open‑source Deno runtime, brings major updates for JavaScript, TypeScript and WebAssembly, offers full backward compatibility with Node.js and npm, stabilizes its standard library, introduces private NPM registry support, workspace/monorepo features, and adds enhanced formatting, linting, and coverage tools.
Version 1.41 of the Deno runtime, released on February 23, reduces compiled binary sizes by up to 50%, introduces official Linux ARM64 binaries, adds several Node.js compatibility fixes, expands API capabilities, and improves language server features, while outlining future plans for further size reductions and custom builds.
Deno 1.26, released on September 29, introduces Node.js compatibility layer enhancements, updated readable‑stream implementation, new APIs like Writable.toWeb() and Readable.toWeb(), performance improvements, added CacheWeb support, a new –allow‑sys permission flag, and bundles TypeScript 4.8, positioning Deno as a faster, more compatible JavaScript runtime.
