How I built the fastest color manipulation library in TypeScript and the optimization techniques I learned

Introduction In 2025, I started building a color manipulation library called colordx. The frontend ecosystem is moving towards CSS Color 4: OKLCH, OKLab, Display-P3, Rec.2020. Most existing libraries were designed for the sRGB era and bolted modern color spaces on top. I wanted to build something that treats the modern stuff as a first-class citizen. But the goal I cared about most was performance. Not just "faster than colord" fast. I wanted colordx to be the fastest option in the benchmarks I