Cache

This is used to store information in a processor because it is quick to read and write. It is quicker because once information is stored it cannot be stored again so it is just re-read and used if needed again. This removes the need for duplicate entries of information, leaving more room for other useful information. A Cache "hit" is when requested information is already stored in the cache, this means it doesn't need to be stored again and can just be retrieved and used. For example if the numbers for a calculation were already stored then the processor could just retrieve this information instead of having to redo the calculation, therefore making it quicker. A Cache "Miss" is when the data isn't stored in cache, this means that it has to be stored and then used.