Incremental building not working with simple Gatsby starter

[jlengstorf]

Hey there! There are a couple things happening with the build beta that add time unrelated to Gatsby itself, but related to the Netlify build environment. I’ve added details in this post that should help cut that time down:

Incremental Gatsby Build time Increases

Hey there! It looks like there are two significant bugs in the beta that are adding to the build times: currently, Node modules installed with Yarn are reinstalled on every build — this adds a whole bunch of extra time: Yarn install runs even when a node_modules cache is found · Issue #433 · netlify/build-image · GitHub installing build plugins automatically adds extra build time: Automatic installation of plugins makes build much slower · Issue #1137 · netlify/build · GitHub I can’t say f…