Same build times regardless of cache

Support
1

I’m using eleventy-fetch on a static Astro build hosted on Netlify.

Whether I build with/out cache, my times are still reflecting a non-cache build. Locally, an uncached site takes ~1.5 min to build, while the same cached version only takes 5 seconds.

I’ve installed netlify-plugin-cache and added this to netlify.toml:

[[plugins]]
package = "netlify-plugin-cache"
  [plugins.inputs]
  paths = [".cache"]

After my deploy has completed, the Netlify log states Successfully cached: .cache ... 195 files in total.
Yet, no matter how many times I redeploy the site, I still get ~1.5 minutes. Therefore, I don’t think it’s rebuilding from the .cache directory. Besides, when I download a specific deploy that should be cached, there is no hidden .cache directory on my local machine.

Is there something more required to make this work?

2

It actually looks like Netlify does not pull the cached images from the built _astro directory. Instead, it regenerates them on every build.

So, is there a simple way to reference these cached assets instead of Netlify transforming them every time?

I tried this, and failed:

[build.processing]
  # Preserve cache between builds
  [build.processing.cache]
    paths = [
      "_astro/**",
      "node_modules/.astro/assets/**"
    ]
3

It’s up to the Astro Netlify adapter to save/restore cache. Our Next.js Runtime does it, for example: next-runtime/src/build/cache.ts at main · netlify/next-runtime · GitHub.

4

I think the adapter only pertains to SSR, not static? In any case I got it working by adding the “node_modules/.astro” directory to the netlify plugin cache module. It cut the time down to just 30 seconds from 1.5 minutes. In the Netlify deploy log I now see reused cache entry next to each previously transformed image.

[build]
publish = "dist"
command = "bun run build"
[[plugins]]
package = "netlify-plugin-cache"
  [plugins.inputs]
  paths = [".cache", "node_modules/.astro"]