esbuild

ELI5 — The Vibe Check

esbuild is a bundler written in Go (not JavaScript) which means it's absolutely unhinged fast — like 10-100x faster than other bundlers. Vite uses it internally to pre-bundle dependencies. It's the secret speed demon behind modern tooling.

Real Talk

esbuild is an extremely fast JavaScript and TypeScript bundler and minifier written in Go. It achieves speed through parallel processing, avoiding unnecessary work, and efficient memory use. It is often used as a preprocessor or minifier inside other tools like Vite, rather than as a standalone build system.

Show Me The Code

// Using esbuild's JS API
import * as esbuild from 'esbuild'

await esbuild.build({
  entryPoints: ['src/app.js'],
  bundle: true,
  minify: true,
  outfile: 'dist/out.js'
})

When You'll Hear This

esbuild finishes in 80ms what Webpack takes 8 seconds to do.,Vite uses esbuild to pre-bundle node_modules.,We switched the minification step to esbuild and shaved 40s off CI.