- Dev Build
- Local Server
- HMR - Hot module Replacement
- File watching Algorithm and it's written in C++
- Caching - Faster builds
- Image Optimization
- Minification
- bundling
- Compressing
- Consistent Hashing
- Code Splitting
- Differential Bundling
- Diagnostic
- Error handling
- HTTPS
- Tree Shaking - Remove unused code
- Different dev and prod buildes