800ms 쿼리를 0ms로 만드는 4단계 계층형 Caching 전략
The Fastest Query Is the One You Never Run: The Four Layers of Rails Caching
The Fastest Query Is the One You Never Run: The Four Layers of Rails Caching
ETags and Conditional Requests: Stop Sending the Same API Response Twice
Your recurring scraper is re-downloading data that didn't change. Here's the 15-line fix (conditional GET)