Big-O Without the Fear: Why Some Code Scales and Some Doesn't
Learn what Big-O really means, how to estimate it by reading code, and why it explains vector search indexes, expensive long prompts, and the hidden cost of chat history.
#performance
Posts tagged #performance
Postgres Performance Basics: Reading EXPLAIN Output and Fixing Slow Queries
Learn to read EXPLAIN ANALYZE output, spot what actually slows a query down, and fix it with better indexes, statistics, and cleaner SQL.
Caching Strategies Compared: Cache-Aside, Write-Through, and Write-Behind
How each pattern moves data between your app, cache, and database, and how to pick the right one for your read/write mix.
Performance & Memory: Profiling, Vectorization, and How Python Manages Memory
Measure before you optimize: learn to time and profile code, vectorize with NumPy, and see how Python uses memory, with an embedding search that gets about 100 times faster.
How Redis Actually Works
A tour of the single-threaded, in-memory engine behind a surprising share of the internet, and the one bet that explains almost every design choice in it.
Architecture Case Study: Migrating a Developer SaaS from Serverless to a $10 VPS with Docker
How we eliminated cold starts, solved database connection pool exhaustion, reduced P99 latency by 92%, and stabilized infrastructure costs using Docker, Caddy, and a $10 VPS.
