Speed up compilation times by going over recommendations in this article.

[dessalines]

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Is your proposal related to a problem?

I recently found this article which has a few recommendations for speeding up compilation times. Its worth trying some of them out.

Article: https://corrode.dev/blog/tips-for-faster-rust-compile-times/

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[Nothing4You]

I think a major time sink in the CI pipeline is that it currently doesn't preserve any data between the steps, which means build cache is not retained.
I looked into this before but it doesn't seem like woodpecker has any good mechanism for that.

[Nutomic]

@Nothing4You It does actually preserve data between steps, thats what CARGO_HOME: .cargo_home on each step is for. Without that parameter it downloads and compiles deps for each step again. Though at the moment we are not caching build data across CI runs, iirc we disabled it because it caused more trouble than it was worth.

[Nutomic]

Done in LemmyNet/lemmy-docs#341