Speed is a feature. Profiling, optimizing, and measuring — making systems fast where it matters and knowing where it doesn't.
Explore Topics
LCP, INP, CLS — the metrics Google uses to measure real-world user experience, and how to improve them.
From first byte to first paint. Understanding how browsers turn HTML, CSS, and JS into pixels on screen.
EXPLAIN plans, index strategies, N+1 queries, and the difference between fast-enough and actually fast.
Finding the hot path. Using flame graphs, CPU profiles, and memory snapshots to locate real bottlenecks.
Cache-aside, write-through, write-behind — picking the right pattern and surviving invalidation.
p50, p95, p99 — why averages lie, how tail latency kills, and what your SLOs should actually target.