What is a cache?

Question

Can I delete them? Will it speed up my internet? Can I also delete cookies?

Sorry a bit new at this?

Answer 1

In computer science, a cache (pronounced /kæʃ/, like "cash" [1]) is a collection of data duplicating original values stored elsewhere or computed earlier, where the original data is expensive to fetch (owing to longer access time) or to compute, compared to the cost of reading the cache. In other words, a cache is a temporary storage area where frequently accessed data can be stored for rapid access. Once the data is stored in the cache, future use can be made by accessing the cached copy rather than re-fetching or recomputing the original data, so that the average access time is shorter. Cache, therefore, helps expedite data access that the CPU would otherwise need to fetch from main memory.



Cache has proven to be extremely effective in many areas of computing because access patterns in typical computer applications have locality of reference. There are several kinds of locality, but this article primarily deals with data that are accessed close together in time (temporal locality). The data might or might not be located physically close to each other (spatial locality).

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You can't delete the cache, instead it is very necessary in your computer. If you have a bigger cache, your computer will be faster.



Cookies are different. You can delete them but not recommended.

Answer 2

Your cache is where your internet browser stores all of the small files that make up a website, such as the html page, the pictures, etc. The intended function is to actually speed up your web surfing when you go to pages you have already visited so that you do not have to wait for the files to be downloaded; your browser instead loads them from your local cache.



You can delete cookies from the same options page that you clear the cache, if you so choose. Honestly, it should not make a noticable difference in speed.

Answer 3

CPU cache

Small memories on or close to the CPU chip can be made faster than the much larger main memory. Most CPUs since the 1980s have used one or more caches, and modern general-purpose CPUs inside personal computers may have as many as half a dozen, each specialized to a different part of the task of executing programs.



Disk cache

While CPU caches are generally managed entirely by hardware, other caches are managed by a variety of software. The page cache in main memory, which is an example of disk cache, is usually managed by the operating system kernel.



While the hard drive's hardware disk buffer is sometimes misleadingly referred to as "disk cache", its main functions are write sequencing and read prefetching. Repeated cache hits are relatively rare, due to the small size of the buffer in comparison to HDD's capacity.



In turn, fast local hard disk can be used to cache information held on even slower data storage devices, such as remote servers (web cache) or local tape drives or optical jukeboxes. Such a scheme is the main concept of hierarchical storage management.

Answer 4

Cache is what the browser uses to store previous website entries, browsing history etc... cookies are part of that



yes you can delete cache and yes you can delete cookies they are not essential files for browsing and will be built back up as you continue to browse



happy browsing

Answer 5

Cache (pronounced cash) memory is extremely fast memory that is built into a computer’s central processing unit (CPU), or located next to it on a separate chip. The CPU uses cache memory to store instructions that are repeatedly required to run programs, improving overall system speed. The advantage of cache memory is that the CPU does not have to use the motherboard’s system bus for data transfer. Whenever data must be passed through the system bus, the data transfer speed slows to the motherboard’s capability. The CPU can process data much faster by avoiding the bottleneck created by the system bus.



As it happens, once most programs are open and running, they use very few resources. When these resources are kept in cache, programs can operate more quickly and efficiently. All else being equal, cache is so effective in system performance that a computer running a fast CPU with little cache can have lower benchmarks than a system running a somewhat slower CPU with more cache. Cache built into the CPU itself is referred to as Level 1 (L1) cache. Cache that resides on a separate chip next to the CPU is called Level 2 (L2) cache. Some CPUs have both L1 and L2 cache built-in and designate the separate cache chip as Level 3 (L3) cache.



Cache that is built into the CPU is faster than separate cache, running at the speed of the microprocessor itself. However, separate cache is still roughly twice as fast as Random Access Memory (RAM). Cache is more expensive than RAM, but it is well worth getting a CPU and motherboard with built-in cache in order to maximize system performance.



Disk caching applies the same principle to the hard disk that memory caching applies to the CPU. Frequently accessed hard disk data is stored in a separate segment of RAM in order to avoid having to retrieve it from the hard disk over and over. In this case, RAM is faster than the platter technology used in conventional hard disks. This situation will change, however, as hybrid hard disks become ubiquitous. These disks have built-in flash memory caches. Eventually, hard drives will be 100% flash drives, eliminating the need for RAM disk caching, as flash memory is faster than RAM.

Answer 6

a cache is where ur most used data is stored like username and password and it doesnt affect ur internet connection, cookies can be deleted from the options menu in internet explorer or firefox