zod notes

Plate 04

Ajv vs Zod: 3.9M vs 1.1M Validations per Second

ajv 8.20.0 (+ajv-formats 3.0.1) vs zod 4.6.5 on the same nested user shape as zod-vs-valibot. Warm medians (2k warmup + 9x50k): Ajv validate ok 3,933,337 ops/s vs zod.safeParse 1,138,406 (~3.5x). Bad input: Ajv allErrors 4,094,452 vs Zod 435,537 (~9.4x). Setup: Ajv new+addFormats+compile median 6.47 ms vs Zod build 0.17 ms; break-even ~10k validations. Browser gzip: Ajv runtime 41 KB, Ajv standalone 1.8 KB, Zod classic 93 KB, zod/mini 6.8 KB. Fixture /workspace/bench-ajv-zod/.

Hands-on5 Oct 2026 · 6 min

Zod vs Valibot: 1.14M vs 0.97M Parses

zod 4.6.5 vs valibot 1.5.0 on one nested user schema (uuid/email/age/tags/profile/enum). Warm medians after 2k warmup + 9×50k: zod.parse 1,144,494 ops/s vs valibot.parse 968,187 (~1.18×). safeParse fail: valibot 697,760 vs zod 415,523 (~1.7×). esbuild minify+gzip9: 452,999/92,636 B vs 85,126/15,422 B. Package trees ~6.1 MB vs ~1.9 MB. Fixture /workspace/bench-zod-valibot/.

Hands-on5 Oct 2026 · 4 min