Bun 1.4 ships with Rust rewrite, enhanced Node.js compatibility, and new WebView feature

Bun 1.4 has been released, marking the first stable version since its significant rewrite in Rust. This update introduces numerous new features, including enhanced Node.js compatibility with over 1,500 additional tests, substantial performance improvements in CPU and memory usage, and faster startup times. Notably, Bun.WebView now offers integrated browser automation capabilities, supporting macOS WebKit and control of local Chromium instances via the Chrome DevTools Protocol. The release also includes new functionalities like Bun.Image, Bun.markdown, Bun.cron(), and improved testing and package management commands. AI

IMPACT Enhances developer tooling for web automation and API development, potentially streamlining workflows for AI-powered applications.

RANK_REASON This is a software release for a developer tool, not a frontier model release or significant industry event.

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• Bun 1.4
• Bun.WebView
• Chrome DevTools Protocol
• Hugging Face
• macOS
• Node.js
• OpenAI
• Qwen 3.8-27B
• Rust
• TypeScript
• WebKit

• product
• infra

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