Why is Zod so slow?

Zod's runtime interpretation architecture makes it significantly slower than AOT-compiled validators like Typia in high-throughput scenarios. While this performance gap is negligible for typical web applications, it becomes critical in systems handling billions of requests. The article explains the interpreter vs compiler trade-off and demonstrates a practical solution: using a build script to convert Zod schemas into optimized JSON Schema validators with ajv, achieving production performance while maintaining Zod's developer experience during development.