After you make a fast web site, keep it fast by measuring it over time. Read Use Speedlify to Continuously Measure Site Performance. Created by @zachleat.
- Requires Node 12+
- Each file in
_data/sites/*.jsis a category and contains a list of sites for comparison.
npm install
npm run test-pages
npm run start
Can run directly on Netlify (including your tests) and will save the results to a local cache (via Netlify Build Plugins, see plugins/keep-data-cache/).
Speedlify will also save your data to /results.zip so that you can download later. This serves as a fallback backup mechanism in case your Netlify cache gets blown away. Just look up your previous build URL and download the data to restore.