Latest Bun Update Brings Performance Improvements

Hello JavaScript Enthusiasts!

\ Welcome to another edition of "This Week in JavaScript"!

\ From Bun 1.2’s performance improvements to AI-powered web extensions in Mozilla Firefox, along with the latest tools shaking up the ecosystem, we have a lot to unpack. \n \n Let’s get right into it!

Bun 1.2 is making headlines in the JavaScript runtime scene, pushing the boundaries of Node.js compatibility with significant updates. Thousands of bug fixes and performance improvements make Bun a more reliable option for production-ready environments. Migrating from Node.js has never been easier, as Bun minimizes breakage and maintains functionality.

\ Key Features:

• Text-Based Lockfile: Bun transitions to a text-based lockfile for easier dependency management and debugging, improving clarity in project workflows.
• Native Support for S3 & Postgres: Developers can now enjoy seamless integration with Amazon S3 and Postgres, accelerating cloud development setups.
• JSONC Support: JSON files with comments make configuration more readable and manageable.
• 3x Faster Express.js: A massive performance boost, making Express.js apps run up to 3x faster.

Transformers.js v3.3 continues to advance the machine learning landscape, delivering cutting-edge NLP (natural language processing) and TTS (text-to-speech) directly to your browser. No server-side processing is required—everything runs smoothly client-side.

\ Standout Features:

• StyleTTS 2: A near-human text-to-speech model that works within the browser, perfect for voice assistants or speech features.
• Grounding DINO: Zero-shot object detection that works without labeled data, ideal for real-time applications.
• React Integration: Improved integration with React makes using ML models in web apps easier than ever.
• Live Demos: Test real-time TTS capabilities with impressive results, rivaling cloud services.

Mozilla Firefox’s Nightly browser introduces a machine learning API, enabling on-device ML tasks with no need for cloud processing. This privacy-first approach reduces latency while ensuring data security.

\ What You Can Do with Firefox’s ML API:

• On-device Text Summarization: Summarize articles and web content without external servers.
• Object Detection & Image Classification: Perform tasks like object recognition directly in the browser.
• Powered by Transformers.js & ONNX Engine: Seamless integration with these tools offers fast, secure ML operations.

\ This API brings privacy-focused, on-device ML to developers, creating new opportunities for AI-powered web applications.

Let’s take a quick look at the latest tools making waves in the JavaScript world this week!

• Rspack v1.2: Boosts bundling efficiency with a persistent cache (hot starts 250% faster!), Yarn PnP support, and Angular integration.
• Capacitor 7: Fully supports Android 15 and iOS 18, Swift Package Manager, and streamlined dependency management for cross-platform app development.
• Vitest 3.0: Enhances Vite-native testing with multi-browser setups, line-based test filtering, and community-driven innovations.
• ArkType 2.0: Runtime validation redefined—100x faster than Zod, bridging TypeScript to JavaScript effortlessly.
• React Admin 5.5: Now supports React 19, React Router 7, and MUI 6, with bulk actions, string array editing, and better caching for B2B frontends.

\ If you found these JavaScript updates useful, give this post an upvote to help others discover it.

\ Don’t forget to share it with your fellow developers, and keep an eye out for more insights in the JavaScript world.

\ Until next time, happy coding!

Bun 1.2

Transformers.js v3.3

Mozilla’s ML API

Rspack v1.2

Capacitor 7

Vitest 3.0

ArkType 2.0

React Admin 5.5