Nevertheless, caches have proven themselves in many areas of computing, because typical computer applications access data with a high degree of locality of reference. To be cost-effective and to enable efficient use of data, caches must be relatively small. Cache hits are served by reading data from the cache, which is faster than recomputing a result or reading from a slower data store thus, the more requests that can be served from the cache, the faster the system performs. A cache hit occurs when the requested data can be found in a cache, while a cache miss occurs when it cannot. In computing, a cache ( / k æ ʃ/ ( listen) kash, or / ˈ k eɪ ʃ/ kaysh in Australian English ) is a hardware or software component that stores data so that future requests for that data can be served faster the data stored in a cache might be the result of an earlier computation or a copy of data stored elsewhere.
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