Developer releases free open-source full-stack performance engineering guide on GitHub

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A backend developer has published a free, open-source resource called 'FullStack Performance Mastery' on GitHub, aimed at mid-level to senior developers looking to improve application performance. The guide is structured across six levels, covering both frontend (React, Next.js, TypeScript) and backend (Node.js, NestJS, PostgreSQL) performance topics. Each topic follows a consistent three-file format: detecting the problem, applying the fix, and a fully runnable code project with real benchmark outputs. The author built the resource after finding existing online performance content outdated, lacking real numbers, and disconnected between frontend and backend concerns. The project is entirely free with no paywalls or newsletter requirements, and uses tools including OpenTelemetry, Prometheus, Grafana, and Clinic.js.

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