/zod-bundle-sizes

Tests for bundle sizes for various versions of zod

Primary LanguageJavaScript

zod bundle size testing

Runnig the tests

npm ci && npm run build

This will:

  • Install dependencies
  • Bundle code using ESBuild, Rollup and Webpack
  • Print the bundle sizes for the various scenarios to the console
Zod version Module system ESBuild bundle size Rollup bundle size Webpack bundle size
v3 CommonJS 68K 68K 68K
v4 CommonJS 288K 255K 254K
v4-mini CommonJS 279K 246K 245K
v3 ESM 55K 52K 52K
v4 ESM 41K 33K 35K
v4-mini ESM 41K 33K 35K

Note

Using ESBuild and ESM, the tree-shaking only seems to work if you import using import * as z from 'zod/v4-mini';. Importing using import { z } from 'zod/v4-mini' results in much larger bundle sizes.