Cookie sessions and JWTs solve the same problem in different ways. Here's how each behaves under revocation and scale, and the pitfalls that catch teams out.
Over-indexing, missing composite indexes and the wrong column order are the usual suspects behind slow queries. Here is how to read a query plan and fix each one.
Build a token-bucket rate limiter in Node.js backed by Redis, with atomic Lua updates, useful response headers, clear 429 errors and a load test that proves...
