Cache

lastmod 2024-11-18created 2018-06-2810 edits

In computer science, a cache (North Korean standard language: kaeswi, gosogwanchunggi "high-speed buffer", gosogwanchunggieokgi "high-speed buffer memory") is a temporary place where data or values are copied in advance. A cache is used when accessing the original data takes a long time compared to accessing the cache, or when you want to save the time of recomputing a value. If data is copied into the cache in advance, it can be accessed faster without computation or access time.

Caches are widely used in many fields to improve system efficiency.

Category

• Disk cache
• Page cache
• Web cache
• Memoization
• Memory cache
  • Memcached
  • Redis
  • Keyv
• CPU cache
• Web cache
  • HTTP:Headers:Cache-Control
  • Cacheable - Keyv-based caching package for Node.js

Issues

• Cache Busting - The problem where, because of a leftover old cache, a newly deployed browser or images, etc. are not reflected and the old cached state is still being used.

Favorite site

• Wikipedia (en) Cache
• [Recommended] A very specific explanation of how caches work ¹

References