Query Caching
Query caching is a performance optimization technique that stores the results of database queries or API calls in a temporary storage layer (cache) to avoid redundant computations or data fetches. It reduces latency, decreases load on backend systems, and improves application responsiveness by serving cached data for identical subsequent requests. This concept is widely implemented in web applications, databases, and distributed systems to enhance scalability and user experience.
Developers should use query caching when building high-traffic applications where database queries or API calls are expensive, repetitive, and read-heavy, such as in e-commerce sites, social media platforms, or content management systems. It is essential for reducing server load, minimizing response times, and handling concurrent users efficiently, especially in scenarios with frequently accessed but infrequently updated data like product listings or user profiles.