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 be barely usable on slow ones.

In this session, I'll share my journey of gradually adapting how we deliver pages to better cater to our user's constraints on a platform with 15mi+ sessions per month—where simply rewriting everything from scratch is not an option.

With an eye on maintenance and scalability, we'll discuss legacy codebases, automation/code generation, polyfilling strategies, main thread offloading, and many other tips and tricks for large platforms targeting emerging markets.