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Summary: With this, we do all the transformation and wrapping of files inside the workers, which mean faster initial builds (because parallelization and caching), and more legacy code that can be removed (see the following diff). I've done some tests locally, and while the initial builds are slightly faster, the increase is not super substantial (the big win was in the diff were I moved the wrapping of JS files, in this diff only the assets transformation has speed up). The most important thing that this diff enables is the possibility of doing the minification of modules also in the worker. This will mean that we can cache minified files and prod builds will get significantly faster - almost as fast as development builds (this will be relevant mainly for the opensource community). Reviewed By: davidaurelio Differential Revision: D6439144 fbshipit-source-id: ba2200569a668fcbe68dbfa2b3b60b3db6673326
Metro Bundler
🚇 The JavaScript bundler for React Native.
- 🚅 Fast: We aim for sub-second reload cycles, fast startup and quick bundling speeds.
- ⚖️ Scalable: Works with thousands of modules in a single application.
- ⚛️ Integrated: Supports every React Native project out of the box.
This project was previously part of the react-native repository. In this smaller repository it is easier for the team working on Metro Bundler to respond to both issues and pull requests. See react-native#13976 for the initial announcement.
Installation & Documentation
See the Metro website for documentation.