Facebook’s open source browser contributions

This post details Meta's contributions to evolving the web platform to improve web application performance, specifically addressing the performance gap between web and native applications. Key contributions include the proposal and implementation of the `isInputPending()` API to improve JavaScript scheduling and responsiveness, the integration of retired instruction counts into Chrome's performance tracing system for better benchmarking, the proposal and implementation of a native JavaScript Self-Profiling API for collecting execution stack traces with low overhead, and the partnership with Mozilla to propose and implement the experimental BinAST binary encoding format for JavaScript to improve parsing efficiency by allowing selective parsing of code.