#js runtimes

BUN is a modern all-in-one JavaScript runtime environment that achieves new levels of performance. It includes BUN dev, a fast front-end dev server, BUN install, a speedy package manager, and BUN run, a fast package runner. BUN supports JSX, has optimized React server-side rendering, and offers hot module reloading on the server. The priorities for BUN include stability, node compatibility, documentation improvement, missing features in BUN install, AST plugin API, native Windows support, Bundler and Minifier optimization, and easier deployment to production. BUN's AST plugin API allows for bundle-time JavaScript execution and embedding code, potentially inspiring new frameworks.

Deno aims to provide Node.js compatibility to make migration smoother and easier. While Deno can run apps and libraries offered for Node.js, not all are supported yet. There are trade-offs to consider, such as incompatible APIs and a less ideal developer experience. Deno is working on improving compatibility and the transition process. Efforts include porting Node.js modules, exploring a superset approach, and transparent package installation from npm.

Welcome to React Advanced London. Today's agenda: what is bun? Features, benchmark, demo, key takeaways. Bun provides a better developer experience, faster CI, and decreased app file size. Building bun on top of Zig prioritizes performance, stability, and compatibility. Install bun with npm or download the binary from the official website. Bun is a comprehensive development toolkit with a fast and efficient package manager. Learn how to benchmark CLI commands using Hyperfine with flags. Compare different package managers. Bond is fast and provides a few features in its package manager: install, add, remove, update, link. Test the bond test runner against vtest and jest using hyperfine. Discover the features supported by the test runner and the importance of bundling in JavaScript applications. Learn about the main.js code, the performance comparison of different bundlers, and the features offered by Bun, including loaders and macros. Explore macros in Bonn and how to optimize the code by including the type macro. Discover the benefits of Bonn, such as reducing CPU usage and fast installation of node dependencies.

The Node.js Test Runner is presented as a better alternative to Jest, offering more flexibility and improved performance. It supports TypeScript out of the box and provides comprehensive test suite visualization. The test runner has native support for code coverage and upcoming features include module mocking and improved filtering. Shifting to the test runner is simple and helps the community grow.

Welcome to my talk on testing alternative runtimes with Node and VTest. VTest is a popular testing framework that allows dynamic code evaluation and runs inside Cloudflare workers. Durable objects provide distributed JavaScript class instances with unique IDs and persistent storage for improved developer experience. The testing framework in Cloudflare workers automatically undoes writes to storage and supports seeding data. Mocking outbound fetch requests is also possible in Cloudflare workers.

This Talk introduces Deno, a custom JavaScript runtime similar to Node.js, and discusses the benefits of using a custom runtime. It explores the process of building a custom runtime with Deno in Rust, including the integration with Cargo and the ability to mix and match crates and APIs. The Talk also covers the implementation of the setTimeout function in both Run.js and Runtime.js, and provides examples of how to fix errors and implement additional functions. Overall, the Talk highlights the flexibility and possibilities of creating custom runtimes with Deno.

NPM packages can be potentially dangerous, so it's important to be proactive in managing them. Lava Mode allows you to detect and investigate suspicious packages before deploying your app. Lavamote prevents unauthorized access to sensitive resources by isolating dependencies and using hardened JavaScript. Lava Mode makes it easier to analyze obfuscated files and understand their actions.

The Talk explores the magic behind Node.js and delves into its components, including V8, libuv, and the C++ bridge. It discusses the workflow and execution process, the use of NodeMod, and the understanding of console functions. The Talk also covers Node.js functions and scheduling, the introduction of runtimes, and the collaboration between JavaScript runtimes. It concludes with insights on content production, the choice of Node.js, and the inspiration behind it.

The Talk discusses the concept of instant websites, aiming to minimize the time between user interaction and unblocking the user. It emphasizes prioritizing the loading of primary content and delaying the loading of secondary content to improve page loading times. Server-side rendering is highlighted as a faster alternative to client-side rendering, reducing network round trips and improving rendering times. The concept of island architecture is introduced, where only the JavaScript needed for interactive components is shipped to the client. The Fresh web framework is presented as a speed-focused framework for Deno, offering automatic CSS inlining and using Preact for client-side interactivity.

Today's Talk explores the future of JavaScript runtimes, their evolution, and impact on software development. It discusses the historical trends of JavaScript, the adoption of new tools and libraries, and the convergence of Node and Deno. The emergence of isolate clouds and their potential to replace traditional VMs and containers is also highlighted. Additionally, the talk touches on the possibilities of JavaScript in exotic use cases, its impact on machine learning, and the potential for TypeScript to become the de facto language for JavaScript development.