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Next.js 16's Turbopack is 2.5x faster, but the bundler is only 4% of your build

Next.js 16 makes Turbopack the default bundler and puts a number on it: builds 2 to 5 times faster than webpack. I wanted to know whether that holds on something bigger than the starter template, and…

  • Next.js 16 introduces Turbopack as default bundler, 2.5-5x faster than webpack
  • Bundler only 4% of total build time, other phases consume majority
  • Turbopack's caching accelerates compiling step 19x, but total build time only 4x faster

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