What are the best practices for eager and lazy loading?

What are the best practices for eager and lazy loading?

Eager loading loads all necessary data upfront, while lazy loading loads data on demand. Best practices include using eager loading for critical data and lazy loading for non-essential resources.

Can you give examples of when to use each?

Sure! Use eager loading for user profiles on a dashboard where immediate access is crucial. Use lazy loading for images in a long article, loading them as the user scrolls.

What are the performance implications of each?

Eager loading can improve performance by reducing the number of requests, but it may increase initial load time. Lazy loading can enhance perceived performance by speeding up the initial load but may lead to delays when fetching data.

Are there any tools to help implement these strategies?

Yes, frameworks like React and Angular have built-in support for lazy loading, while ORM tools often provide eager loading options. Additionally, libraries like Intersection Observer can help with lazy loading images.