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https://issues.apache.org/jira/browse/DISPATCH-1739?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17170859#comment-17170859
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ASF GitHub Bot commented on DISPATCH-1739:
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jiridanek commented on pull request #809:
URL: https://github.com/apache/qpid-dispatch/pull/809#issuecomment-668651509
> Or not use -j2?
Probably. I'll leave -DUSE_BWRAP=ON and remove the -j2.
> Also, did you try less than 4?
Yes, there is about 1 min improvement in total time between 3 and 4. I did
not try 2.
There is the Python tox test, that is the most lengthy one. It is
essentially running the other tests on py27 and then 36. I was thinking of
giving it a shard of its own, but it seemed to me overly elaborate.
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> Use GitHub Actions w/ sharding and bubblewrap for some fast CI
> --------------------------------------------------------------
>
> Key: DISPATCH-1739
> URL: https://issues.apache.org/jira/browse/DISPATCH-1739
> Project: Qpid Dispatch
> Issue Type: Improvement
> Components: Tests
> Affects Versions: 1.12.0
> Reporter: Jiri Daněk
> Assignee: Jiri Daněk
> Priority: Major
> Fix For: 1.13.0
>
>
> GitHub Actions is a task runner associated with a GitHub project. It is
> conceptually similar to Travis, except that it has some extra features, and
> the waits for computational resources are much shorter (currently).
> Sharding is a technique to speed up the execution of tests. Instead of
> running the tests on one machine one after another, copy the build directory
> over to multiple machines, say two, and have the first execute the
> odd-numbered and the second one the even-numbered tests. With luck (if
> copying the build directory is relatively fast, and the tests all take
> approximately the same time), this will cut the execution time in half.
> Bubblewrap (https://github.com/containers/bubblewrap) is a sandboxing tool
> available on Ubuntu and other systems. It is similar to systemd-nspawn except
> it does not require sudo or user namespace support in the kernel. It is
> similar to docker, except it does not use images, instead it selectively
> mounts directories from the host. Bubblewrap can create an isolated network
> namespace, which allows running multiple tests at the same time, each in its
> own bubblewrap sandbox, and they don't clash on ports. With bubblewrap,
> running {{ctest -j4}} is safe.
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