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| -rw-r--r-- | doc/manual.cli | 11 |
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diff --git a/doc/manual.cli b/doc/manual.cli index f9af78d..a550e5a 100644 --- a/doc/manual.cli +++ b/doc/manual.cli @@ -817,4 +817,15 @@ create a PR from a local feature branch, you may immediately see the successful CI result because it is the same as for the branch push to the feature branch. +Finally note that the GitHub CI model is quite wasteful of CI resources in +general and the head sharing makes this problem even worse. Specifically, +GitHub CI builds every commit indiscriminately, regardless of what was +changed. So a minor tweak to \c{README.md} will trigger a full rebuild even +though nothing that needs building has changed. The head sharing issue makes +the situation worse because the CI integration cannot easily cancel an +in-progress build when a new commit is added to a PR because the result could +be shared with a branch push or another PR. Nevertheless, this integration +will attempt to cancel a stale build of a remote PR provided it's not +(currently) shared. + " |