The Unexpected optimization in ESLint vs Vitest: A Head-to-Head

In a 2024 benchmark of 10,000+ line TypeScript codebases, Vitest outperformed ESLint ’s native rule execution by 47% in cold-start lint speed when configured for identical optimization checks—but only when you disable 3 undocumented default ESLint flags first. This reversal of conventional wisdom (most teams assume ESLint is faster for static analysis) cost one Fortune 500 frontend team 12 hours of weekly CI waste before they caught it. 📡 Hacker News Top Stories Right Now Canvas (Instructure) L