Vercel Functions Database Latency

This demo helps observe the latency characteristics of querying different popular data services from Vercel Functions.

https://db-latency.vercel.app

Providers

Here is an overview of all data service providers and the compute locations available in this app:

Provider	Edge (Global)	Edge (Regional / US East)	Node
Convex (SDK)	✅	✅	✅
Fauna	✅	✅	❌
Grafbase (GraphQL)	✅	✅	❌
Neon	✅	✅	❌
Fauna	✅	✅	❌
PlanetScale w/ Kysely	✅	✅	❌
PlanetScale w/ Prisma ORM	✅	✅	✅
PlanetScale w/ Drizzle	✅	✅	✅
PolyScale	✅	✅	❌
Shopify (Storefront GraphQL API)	✅	✅	❌
Supabase w/ supabase-js	✅	✅	❌
Supabase w/ Prisma ORM	❌	❌	✅
Supabase w/ Drizzle	❌	❌	✅
TiDB Cloud (serverless-js)	✅	✅	❌
Tigris	✅	✅	❌
Turso	✅	✅	❌
Upstash (SDK)	✅	✅	❌
Xata (TypeScript SDK)	✅	✅	❌

Testing Methodology

1. Smallest atomic unit, e.g. 1 item / row.
2. Data schema:

interface EmployeeTable {
  emp_no: number;
  first_name: string;
  last_name: string;
}