Bun is a comprehensive toolkit for JavaScript, TypeScript, and JSX that functions as a single executable, merging a high-performance runtime, package manager, test runner, and bundler into a seamless alternative to Node.js, offering extensive compatibility and significantly lower startup times and memory consumption. Developed in Zig and utilizing Apple’s JavaScriptCore, Bun runs JavaScript and TypeScript files, scripts, and packages with performance levels that surpass those of conventional tools, while inherently supporting zero-config setups for TypeScript, JSX, and React. Its integrated package manager dramatically speeds up dependency installations, achieving up to 30 times faster than npm, and features capabilities such as workspaces, global caching, migration assistance, and dependency auditing. Additionally, Bun’s test runner, which is compatible with Jest, includes built-in coverage and supports concurrent test execution, while the bundler can handle TypeScript, JSX, CSS, and more without requiring any configuration, thus allowing for the creation of single-file executables effortlessly. The versatility of Bun makes it an appealing choice for developers seeking efficiency and simplicity in their workflows.
