From latency to instant: Modernizing GitHub Issues navigation performance

GitHub has undertaken a comprehensive overhaul of its Issues platform to address latency and improve user-perceived performance by shifting data processing to the client side, utilizing client-side caching with IndexedDB, and employing a service worker for optimizing navigation paths. This approach allows for rendering from local data and subsequent background revalidation, reducing perceived latency and enhancing the user experience by making interactions feel nearly instantaneous. The implementation of these strategies has resulted in a significant increase in instant navigations and an improved cache-hit ratio, despite trade-offs related to controlled staleness. The ongoing transition from Rails-rendered pages to a React frontend aims to further decrease hard navigation occurrences, with future plans to optimize the backend stack and UI delivery to ensure fast navigation as the default experience. The changes are part of a continuous effort to enhance performance and align with modern standards, as users now benchmark GitHub against the fastest experiences available.

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