actions / actions/cache

Why post-action is so slow?

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#1,508 1 comment 13 reactions 0 assignees View on GitHub

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Dominant language
TypeScript
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Description

Something strange in my pipeline with actions/ccache v2, post-action > 50% of build time (clear build, 0% cache hit)

image

Contributor guide

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with the pipeline run described in the issue and inspect the actions/ccache v2 post-action timing, especially the clear build with 0% cache hit. Compare the post-action duration with the total build time and use the attached timing image as the baseline; the investigation is complete when the cause of the slowdown and its scope are established.

Written by the indexing model from the issue text.

Assessment

Tech stack
github-actions
Domain
build-system, ci-cd, performance
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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