Dimitri Mitropoulos - Solving Your TypeScript Performance Problems (ASL Verison)

Solving Your TypeScript Performance Problems TypeScript performance problems are one of the most common (and least understood) sources of pain in large React codebases. These issues quietly slow you down, showing up as sluggish editors, long CI times, and confusing “type too complex” errors that are hard to diagnose. For too long, these problems have felt like a dead end, but in this session you’ll learn how to take the reins, diagnose what’s actually happening, and fix it. You’ll be introduced to tools like TypeScript’s own --generateTrace, as well as Attest (a type-check benchmarking tool) and TypeSlayer (a fully featured type performance analysis tool). With these skills and tools in hand, it’s not uncommon to see five-line PRs shave minutes off CI time while dramatically improving editor responsiveness (you’ll see real-world examples!). Now that the ecosystem has tools purpose-built for this kind of work, there’s no need to grep through multi-gigabyte JSON files like we used to.