Speaker
Abstract
In a world with a wide variety of network connections, any user can have a slow experience, and apps that delight users on fast connections can barely be usable on slow ones.
In this session, I'll share our journey of gradually adapting how we deliver pages to better cater to our users' constraints on an enterprise-scale platform with millions of sessions per month—where simply rewriting everything from scratch is not an option.
With an eye on maintenance and scalability, we'll discuss:
- How to leverage static analysis and related tooling to detect patterns and conduct large codebase migrations.
- Different polyfill strategies to deliver the same experience in legacy browsers.
- How to use popular techniques like code splitting and virtualized rendering to optimize the User Experience.
- Results of using synthetic tests and Real User Monitoring (RUM) tooling to understand how visitors experience your application.
Topics
web performance
web polyfills
legacy codebases
static analysis
76%
senior dev or higher
1:11
speaker ratio
60+
practitioners
QCon London 2025 is a three day conference for senior software engineers, architects and team leads. An international program committee of working engineers selects every session. Patterns and practices, not products and pitches.
Part of the track
Emerging Trends in the Frontend and Mobile Hosted by Sareh Heidari Senior Software Engineer @F1 Arcade®From the same track
Wednesday 9 April
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