Lazy Loading

What is the N+1 Query Problem and How Do You Fix It?

The N+1 query problem is a performance anti-pattern where code runs one query to fetch a list of N parent records, then runs one additional query per parent to…

ORM Lazy Loading vs Eager Loading: What is the Difference?

Lazy loading fetches an object's related data only at the moment it is actually accessed in code, issuing a separate query on demand, while eager loading fetch…

What is the Cache-Aside (Lazy-Loading) Caching Pattern?

Cache-aside is a caching pattern where the application code itself checks the cache first, and on a miss reads from the database, populates the cache with that…

What is the Proxy Pattern?

The Proxy pattern provides a surrogate object that implements the same interface as a real subject and controls access to it, allowing extra logic such as lazy…

What is the Cache-Aside Pattern?

The cache-aside pattern (also called lazy loading) puts the application in charge of the cache: on a read the app checks the cache first and only loads from th…

What is Lazy Loading?

Lazy loading is the technique of deferring the loading of a resource — an image, a script chunk, or a component — until it is actually needed, instead of loadi…

What Is React Suspense and How Does It Work?

React Suspense is a component that lets you declaratively show a fallback UI, like a spinner, while its children are not yet ready to render because they are w…

What Are Code-Splitting Strategies and Why Do They Matter?

Code splitting breaks a single large JavaScript bundle into smaller chunks that load on demand — by route, by component, or by vendor library — so the browser…

What Are Key Image Optimization Techniques for the Web?

Web image optimization combines choosing efficient formats (WebP/AVIF), serving correctly sized responsive images via srcset, lazy-loading offscreen images, an…

What Is the Intersection Observer API and Why Use It?

The Intersection Observer API lets you asynchronously detect when a target element enters or exits the viewport (or another ancestor element), without the expe…

How Do React.lazy and Suspense Enable Code Splitting?

React.lazy() defers loading a component`s code until it is actually rendered, and Suspense lets a parent declare a fallback UI to show while that lazily-loaded…

How Do You Manage Third-Party Script Performance?

Third-party scripts (analytics, ads, chat widgets, A/B testing tags) hurt performance by blocking the main thread with parser execution, adding render-blocking…