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Q&A

Can I reduce build time?​

First, please check the specifications of your PC.
The standard is based on machines with 8 or more cores as recommended by SHARP, especially those with large L1/L2 CPU caches.

And if the build still takes a long time, try the following settings.

Reduce image width to be optimized​

Reduce the image width generated by next/image as follows.

next.config.js
module.exports = withExportImages({
  images: {
    deviceSizes: [640, 960, 1280, 1600, 1920],
  },
})

Reduce effort with sharp options​

export-images.config.js
module.exports = {
  sharpOptions: {
    png: {
      effort: 1,
    },
    webp: {
      effort: 0,
    },
    avif: {
      effort: 0,
    },
  },
}