Everything you need to know about caches


Everything you need to know about cache file


Cache memory

Cache memory refers to a fast storage buffer in the central processing unit (CPU) of a computer, allowing the computer to store data temporarily, making information retrieval faster and more efficient. By storing often-used data in a special memory chip rather than accessing the memory of the computer for the same information each time, cache memory helps maximize the efficiency of the CPU.

What is Cache? 

These days most of the browsers including Google Chrome, Mozilla Firefox and Internet Explorer temporarily store files on your computer when you visit websites. The browsers store a range of files including HTML files, CSS style sheets, JavaScript scripts and much more. So basically, a cache is a software component in these web browsers that stores data so future requests for that data can be served faster. The data stored in a cache might be the result of an earlier computation, or the duplicate of data stored elsewhere. To put it in more simple terms, cache is like a block of memory for temporary storage of data likely to be used again.

Uses of Cache? 

The cache file which is stored in your system will help you in loading the website faster as you’ve visited before. However, certain content can be taken directly from the system itself, instead of pulling it from the server hosting the website. Cache might come handy when you go through a slow Internet connection.

Browser Cache

You might have noticed that when you click the back button in your browser it takes less time to load the page than the time that it took during the first load; this is the browser cache in play. Browser cache is the most common location for caching and browsers usually reserve some space for it.

Proxy Cache

Unlike browser cache which serves a single user, proxy caches may serve hundreds of different users accessing the same content. They are usually implemented on a broader level by ISPs or any other independent entities for example.

Reverse Proxy Cache

Reverse proxy cache or surrogate cache is implemented close to the origin servers in order to reduce the load on server. Unlike proxy caches which are implemented by ISPs etc to reduce the bandwidth usage in a network, surrogates or reverse proxy caches are implemented near to the origin servers by the server administrators to reduce the load on server.
Although you can control the reverse proxy caches (since it is implemented by you on your server) you can not avoid or control browser and proxy caches. And if your website is not configured to use these caches properly, it will still be cached using whatever the defaults are set on these caches.

Clearing Cache One of the problems that cache causes is, it takes up a considerate amount of space on your system’s memory. This might be waste of resource sometimes. However, you can always clear the cache memory in order to free up some space.

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