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What does caches mean?

Updated: 8/10/2022
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9y ago

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The cache is an area of high speed memory set aside to store frequently accessed data. When data is accessed, a copy (and its address in memory) is stored in cache memory. The next time the CPU looks for information, it first checks the cache. If the data is there (called a hit), it can retrieve it from the much faster cache memory. If it is not, then it accesses system memory, puts a copy of the new data in the cache, and processes the information. Disk caching and memory caching significantly improves the overall speed of the computer but there are limits.

Short-term storage. A cache is used to speed up certain computer operations by temporarily placing data, or a copy of it, in a location where it can be accessed more rapidly than normal. For example, data from a storage disk may be cached temporarily in high-speed memory so that it can be read and written more quickly than if it had to come directly from the disk itself; or a microprocessor may use an an on-board memory cache to store temporary data for use during operations. '

A more general meaning of "cache" is any place that objects or information is stored for quick access; e.g. a cache of food.

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Eriberto Mohr

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