What is caching?
Blog post from Postman
Caching is a technique used in software development to temporarily store data, optimizing application performance by reducing redundant data retrievals and minimizing network calls, database strain, and bandwidth usage. While caching can greatly enhance speed, it also introduces complexity across various layers of an application, including server-side, client-side, browser, and proxy/CDN caching. Server-side caching involves strategies like write-aside and read-aside caching, using HTTP headers such as Cache-Control, ETag, and Age to manage data freshness and versioning. Client-side caching, often automatically handled by modern browsers, relies on headers like If-None-Match and If-Match to ensure clients receive the most up-to-date data without unnecessary data transfer. Although caching is not mandatory before production, implementing it thoughtfully can significantly improve application performance and reliability, especially during peak traffic. Developers are advised to start with simple caching implementations, iterating and adapting strategies based on data usage patterns and customer needs to continually refine their caching approach.
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