Some users report performance issues

[ehmicky]

Some users report that this Build plugin makes builds slower instead of faster.

I personally have not encountered this issue: this plugin makes my builds faster. Reasons why builds might be slower could include though:

• writing/reading and upload/downloading the cached public and .cache directories takes more time than it saves
• a bug in utils.cache

To be able to fix this problem, I would need to reproduce it first though either:

• by reproducing it myself
• by having someone else point to a Deploy that exhibits this behavior.

@dsoaress you interacted on the following issue: https://github.com/netlify/build/issues/1125, do you have a Deploy that exhibits this behavior by any chance?

@marisamorby, is there any chance you found some Deploys that do?

[dsoaress]

Hi @ehmicky, I do.

With Netlify Build and netlify-plugin-gatsby-cache.

Only with Netlify Build.

Without Netlify Build.

[ehmicky]

Thanks, this helps a lot!

So this is where the performance difference is coming from:

• When a repository is using a Build plugin that is not in their package.json, Netlify automatically installs it. For the deploy above (only one plugin), this adds 1 minute to the build.
• yarn install performed in the beginning of the build takes 51 seconds instead of 1 seconds. This is done inside the buildbot (not Netlify Build) so this might be a caching issue there.

I will add issues for the two problems above.

Now the netlify-plugin-gatsby-cache plugin itself does reduce the time to perform gatsby build from 109 seconds to 72 seconds. So the issue is not about that plugin but about Netlify Build and the buildbot. So I am closing this issue and created this one instead.