Cache (computing): Difference between revisions

Revision as of 06:53, 3 August 2024

Revision as of 15:20, 6 August 2024

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{{Use dmy dates|date=August 2020}}

{{Use American English|date=July 2024}}

[[File:cache,basic.svg|thumb|upright=1|Diagram of a CPU memory cache operation]]{{Redirect|Caching|3=cache}}

In [[computing]], a '''cache''' ({{IPAc-en|audio=LL-Q1860 (eng)-Back ache-cache.wav|k|æ|ʃ}} {{respell|KASH}})<ref>

{{cite web|url=http://www.oxforddictionaries.com/definition/english/cache|archive-url=https://web.archive.org/web/20120818122040/http://oxforddictionaries.com/definition/english/cache|url-status=dead|archive-date=18 August 2012|title=Cache|work=Oxford Dictionaries|access-date=2 August 2016}}</ref> 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. A '''cache hit''' occurs when the requested data can be found in a cache, while a '''cache miss''' occurs when it cannot. 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.<ref>{{Cite journal|last1=Zhong|first1=Liang|last2=Zheng|first2=Xueqian|last3=Liu|first3=Yong|last4=Wang|first4=Mengting|last5=Cao|first5=Yang|date=February 2020|title=Cache hit ratio maximization in device-to-device communications overlaying cellular networks|url=http://dx.doi.org/10.23919/jcc.2020.02.018|journal=China Communications|volume=17|issue=2|pages=232–238|doi=10.23919/jcc.2020.02.018|s2cid=212649328|issn=1673-5447}}</ref>