React Native Radio RNR 333 - Expo Atlas with Cedric van Putten
May 23, 2025
Cedric van Putten, an engineer from Expo based in Amsterdam, shares insights about Expo Atlas, a revolutionary tool for visualizing Metro bundles. He discusses how Atlas helps developers identify bloat in their apps and enhances the debugging experience. Cedric reveals the tool's journey from an internal solution to an open-source project, detailing its impact on application efficiency and future developments. Additionally, he emphasizes the importance of specialized tools in optimizing React Native development.
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Mazen's Pre-Game Routine
- Mazen Chami has a detailed pre-game soccer routine starting the night before, including stretching and walking on the field barefoot.
- He emphasizes mentally resetting during a game and sticking to rituals to maintain performance.
Expo Atlas's Unique Approach
- Expo Atlas reveals under-the-hood Metro bundler internals, exposing what your app truly ships.
- It surpasses source-map-based tools by showing comprehensive and accurate bundling data including virtual modules.
Keep Bundles Lean
- Keep your JavaScript bundle small to improve app startup and load times, especially on non-Hermes engines and web platforms.
- Avoid large unnecessary dependencies that inflate bundle size and hurt performance and development experience.