Zod v4's Complete Rewrite Narrows the Gap with Valibot's Performance Edge

Zod v4's architectural rewrite delivers 4.2x faster parsing, significantly closing the performance gap that previously favored Valibot. However, Valibot's modular tree-shakeable design retains a crucial advantage in bundle size for client-side and edge deployments, making the choice now dependent on use case rather than raw speed. Zod's ecosystem lock-in through tRPC and react-hook-form remains its strongest competitive moat.