🔧 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...