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Add parallelism to 'branches' command

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Spread the operation of querying which local branches exist across a
pool of processes and build the name map of projects -> branches as
these tasks finish rather than blocking on the entire query. The search
operations are submitted in batches to reduce the overhead of interprocess
communication. The `chunksize` argument used to control this batch size
was selected by incrementing through powers of two until it stopped being
faster.

Change-Id: Ie3d7f799ee8e83e5058536caf53e2979175408b7
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/291342
Tested-by: Chris Mcdonald <cjmcdonald@google.com>
Reviewed-by: Mike Frysinger <vapier@google.com>
This commit is contained in:
Chris McDonald
2020-12-09 14:27:59 -07:00
committed by Mike Frysinger
parent 974774761c
commit 8add62325d
2 changed files with 43 additions and 4 deletions
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.gitignore vendored
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@ -7,6 +7,7 @@ __pycache__
.repopickle_*
/repoc
/.tox
/.venv
# PyCharm related
/.idea/