Bun Outperforms Node.js in Runtime Benchmark

Bun, created by Jarred Sumner and developed by Oven, is written in Zig and uses JavaScriptCore, the engine also used in Safari. It aims to be an all-in-one JavaScript runtime, bundler, transpiler, package manager, and task runner. Bun's key focus is speed, with benchmarks showing significant performance gains compared to Node.js in areas like HTTP request handling, file I/O, and package installation. For example, in an Express-style HTTP test, Bun sustained roughly 52,000 requests per second, while Node plateaued at 13,000. Bun install is often 10-30x faster than npm install. While Bun strives for Node.js compatibility, some challenges remain, particularly with packages relying on native C++ addons or obscure Node.js APIs. However, compatibility has improved significantly, with most npm libraries now functioning correctly with Bun. Bun is also not fully compatible with Node.js APIs, so some npm libs might break with Bun. Bun excels in areas like cold starts, making it suitable for serverless or edge deployments where latency is critical. It also offers native support for TypeScript and JSX, simplifying development workflows. Bun integrates a runtime, bundler, and package manager, which facilitates technical standardization. Its architecture simplifies the developer workflow by reducing the need for separate tools. Despite its advancements, Bun's ecosystem is still maturing compared to Node.js, which has a longer history and a larger community. This can be a risk factor for critical applications requiring maximum reliability. Bun is considered a viable alternative for organizations innovating in their production processes, particularly Digital Factories, and is used in production applications in industrial environments. Bun is rapidly evolving with frequent updates aimed at improving compatibility and adding new features, such as Amazon S3 object storage API and PostgreSQL client.