joel martinez
principal performance engineer, reddit
12 years at google and youtube
Performance engineering is a strategy problem. Most orgs treat it as a tooling problem, buy more dashboards, and wonder why nothing improves. This site is about the work above monitoring: how to design metrics that matter, validate them against reality, quantify business impact, and build the organizational muscle to act on all of it.
Start here
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The 8-Layer Performance Engineering Operating System
The industry has telemetry but not strategy. Here is the 8-layer operating system that covers everything above monitoring.
Recent
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The Phantom Movement Problem
The A/A test that separates metrics you can trust from the ones that just do that sometimes.
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The Anatomy of a Trusted Metric
Five rules that separate a metric a team will act on from one that ends up as wallpaper.