What does the term 'cache' refer to in computing?

The term 'cache' in computing refers to a type of high-speed memory used to temporarily store frequently accessed data and instructions to speed up processing. Caches are designed to be much faster than regular main memory (RAM), allowing for quicker access to data that the CPU needs to retrieve repeatedly. By storing copies of the most used data, caches reduce the time it takes to access this information, thus improving system performance and efficiency.

High-speed memory works by placing essential data closer to the CPU, allowing the processor to retrieve it faster than if it had to access slower forms of storage. This mechanism is crucial for optimizing overall system performance, particularly in environments where speed is a critical factor, such as in modern processors and applications.

Understanding this context highlights the key functionality of cache in computing systems, demonstrating its importance in bridging the speed gap between the processor and slower storage devices.