the.com/cache
the lie your computer tells to feel fast, and it works every time
means A hidden store of things kept ready for quick access — whether supplies stashed away or data your computer keeps close so it doesn't have to fetch it twice.
from From the French cacher, 'to hide,' which traces back to Latin coactare, 'to press together.' Fur trappers and explorers in North America used 'cache' for a secret hoard of provisions buried for later; computing borrowed the word in the mid-20th century for the same idea — a stash kept close at hand. (Note: the homophone 'cachet,' meaning prestige or a seal, is a different French word and unrelated in sense.)
- french roots
- From cacher, meaning to hide something away
- speed trick
- Memory close to the chip beats distant slow storage
- invalidation hell
- Famously one of two hardest problems in computing
- silent leftovers
- Stale cache serves you yesterday's web page today
- pronounced cash
- Not cashay, despite everyone's overconfident attempt
l1 cpu cache — intel core i9-13900k has 32kb l1 instruction cache per core, fastest memory tier
cloudflare edge cache — caches website content at 300+ data centers globally, reduces origin server requests by ~80%
redis cache layer — stores hot data in-memory at companies like netflix and twitter, 100x faster than database queries