Just another (Black) Friday

What this post added

This post details Vercel's performance and resilience during Black Friday and Cyber Monday 2025, highlighting the platform's ability to handle massive traffic surges. It quantifies the scale of requests processed (86.7 billion), peak requests per second (1.9 million), and deployments (2.4 million). It emphasizes the effectiveness of the multi-layered firewall (3.5 billion blocks), including platform firewall for DDoS and WAF for business logic. Techniques like background revalidation and request collapsing are explained for maintaining origin stability and user experience. The post also details the observability features, including real-time dashboards, custom queries, anomaly alerts, and unified signal streams via Drains, to monitor performance and availability during peak load.