#optimization

Guide to choosing an algorithm by its essential properties, finding program errors with well-built test sets, and optimizing a working program.

Practical SQL query tuning guide covering execution order, indexing, keyset pagination, prepared statements, CTEs, and a MariaDB slow-pagination case study.

Two real-world case studies showing how tiny changes, such as reordering one line of code and moving CORS headers to Cloudflare, cut CPU by 70% and data transfer by 63% on high-traffic systems.