In a head‑to‑head benchmark on identical hardware, esbuild bundled a 500‑module TypeScript codebase in 1.2 seconds while Docker 25 rebuilt a comparable multi‑stage container image in 47 seconds — a 39× difference that forces every engineering team to rethink where they spend build time. Both tools dominate modern DevOps stacks, yet they solve fundamentally different problems, and conflating them leads to costly architecture mistakes. This article cuts through the noise with reproducible benchmarks, production case studies, and concrete guidance on when to reach for each tool. 🔴 Live Ecosystem Stats ⭐ moby/moby — 71,537 stars, 18,933 forks ⭐ evanw/esbuild — 38,412 stars, 1,274 forks 📦 npm weekly downloads: esbuild 14.2M, docker CLI 3.8M Data pulled live from GitHub and npm on 2025‑06‑15.…