The KV Cache: The Hidden Engine Behind Every AI Response
Why your Claude or Cursor session suddenly slows to a crawl, and the simple habits that keep it fast. You’re deep in a Cursor session. First few replies stream back almost instantly. Then, twenty messages in, you hit send and the screen just… stares at you. Ten seconds. Fifteen. A spinner. Nothing changed on your end. Same laptop, same wifi, same model. What happened is you tripped the KV cache, and the AI had to relearn your entire codebase from scratch....