Performance

Published on
February 18, 2025
Database Indexes Under the Hood
databases performance backend
Most developers know indexes make queries faster. Fewer know why, or when adding one makes things worse.
Published on
November 20, 2024
Rate Limiting and Caching, The Two Things That Keep APIs Alive
system-design backend performance
Two concepts every backend engineer should understand deeply before their APIs go to production.
Published on
January 9, 2024
The N+1 Query Problem
databases performance backend
N+1 is one of the most common performance bugs in backend development. It's subtle, easy to introduce, and can turn a fast endpoint into a slow one as data grows.
Published on
July 11, 2023
HTTP Caching Headers, A Practical Guide
http performance backend
Cache-Control, ETag, Last-Modified, these headers can make your app dramatically faster or subtly broken. Here's how to use them correctly.

Database Indexes Under the Hood