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Why is browser caching important?
Caching improves and speeds up browsing. Once you’ve downloaded an asset, it lives (for a time) on your machine. Retrieving files from your hard drive will always be faster than retrieving them from a remote server, no matter how fast your Internet connection.
Should redirects be cached?
They’re broken into two tables: redirects that should be cached, and redirects that should not be cached. For example, a 301 response with an expiration date in the future should be cached, but a 302 redirect with an expiration date in the past shouldn’t be cached. The official ruling can be found in RFC 2616.
Are permanent redirects cached?
In the absense of cache control directives that specify otherwise, a 301 redirect defaults to being cached without any expiry date. That is, it will remain cached for as long as the browser’s cache can accommodate it.
Why is caching important in a web browser?
Caching is a useful and surprisingly complex feature of web browsers. In this article, we’ll explain how the browser uses its cache to load pages faster, which factors determine cache duration, and how we can bypass the cache when necessary. Why is Caching Important?
However, in practice, the cache can influence the back button, in very specific circumstances: Page must be delivered over HTTPS, otherwise, this cache-busting won’t be reliable. Plus, if you’re not using HTTPS, then your page is vulnerable to login stealing in many other ways.
What does it mean when browser says do not cache?
This one is actually a bit misleading. It doesn’t mean “do not cache”. This tells the browser to cache the file but not to use it until it checks with the server to validate we have the latest version. This validation is done with the ETag header.
Why is caching slower than fetching a resource from the server?
Fetching a resource over a network will always be slower than retrieving it from local cache. This is true whether the server is on the same network or it’s located on the far side of the world. The browser won’t have any files cached for the site so it will fetch everything from the server.