Edge Functions

Serverless cold starts are a major performance pain point on Vercel. Documentation suggests using Edge, but Edge functions don't support Node.js APIs, making them impractical for most use cases, and support for cold start mitigation is severely lacking.

Supabase's reliance on edge functions is insufficient for applications requiring more powerful compute. Developers frequently need to pair Supabase with external serverless platforms like AWS Lambda, fragmenting their architecture.

Supabase edge functions introduce performance degradation that can become a bottleneck in production applications, limiting their practical utility for performance-critical operations.