11. Performance Tip: Avoid Premature Optimization
While Promise.all is faster, sometimes Sequential is better for User Experience.
If you load 10 heavy images at once, the browser might freeze.
Loading them one by one (or in batches of 3) might feel "smoother" to the user.
Rule of Thumb:
- Data (JSON): Fetch parallel (
Promise.all). - Heavy Assets: Consider sequential or batched loading to keep the UI responsive.
- Writes (POST/PUT): Usually sequential to ensure data integrity.
Understanding the nature of your request is more important than just knowing the syntax.