Technical audits: Optimizing cost, performance, and productivity

What this post added

This post details how Vercel conducts technical audits to identify and optimize bottlenecks impacting cost, performance, and productivity. It categorizes audits into Code Review, Web Performance, and Usage Audits, providing specific examples of issues and solutions related to rendering, caching, third-party scripts, image optimization, API waterfalls, serverless function efficiency, ISR, and data caching. It also outlines a diagnostic-first approach focusing on user experience, resource efficiency, and development velocity, and identifies common patterns like the trade-off between dynamic features and static optimization, and resource optimization for serverless functions and third-party integrations.