How to Optimize Hugo Build Time for Large Websites?

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Check this page on performance.

Performance

Also check

Configure segments

Also see

Building a site with 50,000 pages taking a very long time

If you’re building your site within an IDE (e.g, Microsoft VS Code, etc.), the built-in file watcher can have am impact on build time. If that’s the case, terminate your IDE and build the site from a terminal. And if you haven’t done so arleady, look at the template metrics: hugo --templateMetrics --templateMetricsHints

Lastly, ensure you have enough resources like RAM to run your site. Hugo’s image processing can slow site build time if there are a lot of images. You might consider offloading that to external services like Cloudflare Images.