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This PR brings following optimizations to the CI:
Swatinem/rust-cache
was not configured properly therefore caching did not happen. This PR fixes it.cargo-contract
installation step also didn't use preferences of caching. Optimization in this PR leads to reduction of this step execution time from ~20min to just few seconds.ubuntu_20_64_core
runners withubuntu-latest
, keeping execution time at the same level (build and test against Ubuntu when cache is populated is 15-16min) and slightly slower without cache (25-30min). Related to https://github.com/paritytech/ci_cd/issues/553path-ignore
lists to not trigger CI if files likeREADME.md
and so on changed.