Prisma ORM and Drizzle ORM take fundamentally different approaches to TypeScript types: Prisma uses code generation (precomputed .d.ts files), while Drizzle relies on runtime type inference. Benchmarks using @ark/attest against the Northwind schema show Prisma requires ~95× fewer type instantiations for schemas and has ~2.9× faster check times vs Drizzle 0.44.4. Against Drizzle's 1.0.0 beta (which significantly improves type performance), Prisma's schema check time is still ~93% faster, and query check times remain ~47–83% faster. The post also details specific optimizations made to Prisma's generated types, including structural deduplication (76% file size reduction, 45% check time improvement), homomorphic mapped types, and CI guardrails for type performance regressions.
