Performance Articles
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Improving Performance in Firefox and Across the Web with Speedometer 3
In collaboration with the other major browser engine developers, Mozilla is thrilled to announce Speedometer 3 today. Like previous versions of Speedometer, this benchmark measures what we think matters most for performance online: responsiveness. But today’s release is more open and more challenging than before, and is the best tool for driving browser performance improvements that we’ve ever seen.
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Faster Vue.js Execution in Firefox
Firefox performance on Vue.js has improved significantly throughout the year. Most recently, we sped up reactivity with Proxy optimizations. This change landed in Firefox 118, so it’s currently on Beta and will ride along to Release by the end of September.
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Warp: Improved JS performance in Firefox 83
With Warp (also called WarpBuilder) we’re making big changes to our JIT (just-in-time) compilers, resulting in improved responsiveness, faster page loads and better memory usage. The new architecture is also more maintainable and unlocks additional SpiderMonkey improvements. This post explains how Warp works and how it made SpiderMonkey faster.
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Safely reviving shared memory
At Mozilla, we want the web to be capable of running high-performance applications so that users and content authors can choose the safety, agency, and openness of the web platform. Shared-memory multi-threading is an essential low-level building block for high-performance applications. However, keeping users safe is paramount, which is why shared memory and high-resolution timers were effectively disabled at the start of 2018, in light of Spectre. Until now...
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Building FunctionTrace, a graphical Python profiler
Firefox Profiler is a powerful web-based performance analysis interface featuring call trees, stack charts, flame graphs, and more. All data filtering, zooming, slicing, and transformation actions are preserved in shareable URLs. FunctionTrace is a low-overhead profiler that runs on unmodified Python applications. Integrated with Firefox, it's a new breed of analysis tool project built conveniently on top of the Firefox Profiler.
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The Baseline Interpreter: a faster JS interpreter in Firefox 70
Modern web applications load and execute a lot more JavaScript code than they did just a few years ago. While JIT (just-in-time) compilers have been very successful in making JavaScript performant, we needed a better solution. We’ve added a new, generated JavaScript bytecode interpreter to the JavaScript engine in Firefox 70. Instead of writing a new interpreter from scratch, we found a way to do this by sharing most code with our existing Baseline JIT. Meet the new Baseline Interpreter.
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Firefox brings you smooth video playback with the world’s fastest AV1 decoder
With this week's release of Firefox 67, the new high performance royalty-free AV1 video decoder dav1d is now enabled by default on all desktop platforms (Windows, OSX and Linux) for both 32-bit and 64-bit systems. And work is in progress on rav1e, the Rust AV1 encoder.
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Faster smarter JavaScript debugging in Firefox DevTools
Script debugging is one of the most powerful and complex productivity features in the web developer toolbox. Done right, it empowers developers to fix bugs quickly and efficiently. The DevTools Debugger team – with help from our tireless developer community – has just landed updates that significantly improve performance and reliability.
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Performance Updates and Hosting Moves: MDN Changelog for October 2018
This month's changelog, from the hard-working engineering team that builds and maintains the MDN Web Docs site, covers performance improvements and experiments, infrastructure updates, as well as countless tweaks and fixes to make your MDN experience better and better.
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Cross-language Performance Profile Exploration with speedscope
speedscope is a fast, interactive, web-based viewer for large performance profiles, inspired by the performance panel of Chrome developer tools and by Brendan Gregg’s FlameGraphs. Jamie Wong built speedscope to explore and interact with large performance profiles from a variety of profilers for a variety of programming languages. speescope runs totally in-browser, and does not send any profiling data to any servers.
