Join Sentry’s Evan Purkhiser and David Wang as they walk through Sentry’s 230k LoC Typescript/React codebase. They’ll tell war stories of the good, the bad, and the ugly. Gaze in wonder at their modern usage of Typescript, react hooks, and styled components. Recoil in disgust at their legacy Reflux usage and perplexing Webpack configuration. Step away from the workshop with a working knowledge of techniques to keep a large-scale frontend codebase modern and maintainable.
![React Summit 2023](https://gitnation.imgix.net/stichting-frontend-amsterdam/image/upload/v1619376923/fszvxiu9y2alolt9eymk.jpg?auto=format,compress&fit=scale&w=60)
Back then, Ivan didn’t know how to use performance devtools well. He would do a recording in Chrome DevTools or React Profiler, poke around it, try clicking random things, and then close it in frustration a few minutes later. Now, Ivan knows exactly where and what to look for. And in this workshop, Ivan will teach you that too.
Here’s how this is going to work. We’ll take a slow app → debug it (using tools like Chrome DevTools, React Profiler, and why-did-you-render) → pinpoint the bottleneck → and then repeat, several times more. We won’t talk about the solutions (in 90% of the cases, it’s just the ol’ regular useMemo() or memo()). But we’ll talk about everything that comes before – and learn how to analyze any React performance problem, step by step.
(Note: This workshop is best suited for engineers who are already familiar with how useMemo() and memo() work – but want to get better at using the performance tools around React. Also, we’ll be covering interaction performance, not load speed, so you won’t hear a word about Lighthouse 🤐)
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