npm-check-updates 23.1.0 vs npm outdated on 7 stale deps (axios/eslint/lodash/prettier/react/typescript/vite): ncu proposed 4 majors (React 19, Vite 8, TypeScript 7, ESLint 10) while npm Wanted stayed in-range; wall medians 863 ms vs 783 ms.
syncpack 15.3.3 lint vs npm-check 6.0.1 on a 12-package npm workspaces fixture: syncpack median 491 ms offline with 21 version mismatches; npm-check --skip-unused median 1.54 s at root (registry).
Knip 6.39.0 vs depcheck 1.4.7 on 95 JS files: median wall 574.574 ms vs 581.463 ms (wash). Knip: 26 unused files, 8 unused deps, 56 unused exports. Depcheck: 8 unused deps only. Both agreed on unused production deps.