noun

cache memory

KASH MEM-uh-ree

Cache memory (noun) means a small pool of very fast memory built into or beside a processor that holds copies of the data and instructions it has used most recently, so that they can be fetched again without waiting for slower main memory. Example: “The chip's larger cache memory made the biggest difference in the game benchmarks.”

noun

A small pool of very fast memory built into or beside a processor that holds copies of the data and instructions it has used most recently, so that they can be fetched again without waiting for slower main memory.

"The chip's larger cache memory made the biggest difference in the game benchmarks."

"Programs that fit inside cache memory run dramatically faster."

How to Use Cache memory

Learner’s notes

In plain EnglishA tiny, very fast memory that keeps whatever the processor just used close to hand.

When to use it

Technical. Often shortened to cache when the context is hardware.

Memory tip

Cache is pronounced like cash, not like cachet.

Trace the full origin ↓

Easily confused with

RAM → browser cache buffer →

Common pairings

L3 cache memory cache hit cache miss cache size shared cache

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Fill the Gap

Can you complete this real example?

The chip's larger _____ made the biggest difference in the game benchmarks.

Etymology

From cache, a hiding place, from French cacher, to hide, combined with memory.

Origin: French

Synonyms

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cache CPU cache processor cache fast memory

Related Words

arsenal cache squat stash

Rhymes for cache memory

Cory Tory gory dory Rory ivory glory story Amory theory memory priory

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Frequently Asked Questions

What is the difference between cache memory and RAM?

Both are volatile working memory, but cache memory sits on or beside the processor, is measured in megabytes rather than gigabytes and is far quicker to reach. RAM is much larger and holds everything currently running, while the cache keeps only the small slice being touched right now.

What do L1, L2 and L3 mean?

They are levels of cache arranged by distance from the processor's cores. L1 is smallest and fastest and sits inside each core, L2 is larger and slightly slower, and L3 is bigger still and usually shared between cores. The processor checks each level in turn before going out to main memory.

Is cache memory the same as a browser cache?

No, though the idea is the same: keep a copy of something nearby so you do not have to fetch it again. A browser cache stores web pages and images on your drive, whereas cache memory is physical high-speed memory inside the processor.

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