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function-database-latency

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Visualize the latency of databases from Vercel Functions.

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# Vercel Functions Database Latency

This demo helps observe the latency characteristics of querying different popular data services from [Vercel Functions](https://vercel.com/docs/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)                     | ✅            | ✅                        | ✅   |
| Neon w/ @neondatabase/serverless | ✅            | ✅                        | ✅   |
| Neon w/ Drizzle ORM              | ✅            | ✅                        | ✅   |
| Neon w/ Prisma ORM               | ✅            | ✅                        | ✅   |
| PlanetScale w/ Kysely            | ✅            | ✅                        | ❌   |
| PlanetScale w/ Prisma ORM        | ✅            | ✅                        | ✅   |
| PlanetScale w/ Drizzle           | ✅            | ✅                        | ✅   |
| Shopify (Storefront GraphQL API) | ✅            | ✅                        | ✅   |
| Supabase w/ supabase-js          | ✅            | ✅                        | ❌   |
| Supabase w/ Prisma ORM           | ❌            | ❌                        | ✅   |
| Supabase w/ Drizzle              | ❌            | ❌                        | ✅   |
| TiDB Cloud (serverless-js)       | ✅            | ✅                        | ❌   |
| Tigris                           | ✅            | ✅                        | ❌   |
| Turso                            | ✅            | ✅                        | ✅   |
| Turso w/ Prisma ORM              | ✅            | ✅                        | ✅   |
| Turso w/ Drizzle                 | ✅            | ✅                        | ✅   |
| Upstash (SDK)                    | ✅            | ✅                        | ✅   |
| Xata w/ TypeScript SDK           | ✅            | ✅                        | ✅   |
| Xata w/ Prisma ORM               | ❌            | ❌                        | ✅   |
| Xata w/ Drizzle                  | ❌            | ❌                        | ✅   |

## Testing Methodology

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

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

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