55 lines
1.4 KiB
Bash
Executable file
55 lines
1.4 KiB
Bash
Executable file
#!/bin/sh
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test_description='fetch performance with many packs
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It is common for fetch to consider objects that we might not have, and it is an
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easy mistake for the code to use a function like `parse_object` that might
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give the correct _answer_ on such an object, but do so slowly (due to
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re-scanning the pack directory for lookup failures).
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The resulting performance drop can be hard to notice in a real repository, but
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becomes quite large in a repository with a large number of packs. So this
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test creates a more pathological case, since any mistakes would produce a more
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noticeable slowdown.
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'
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. ./perf-lib.sh
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. "$TEST_DIRECTORY"/perf/lib-pack.sh
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test_expect_success 'create parent and child' '
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git init parent &&
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git clone parent child
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'
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test_expect_success 'create refs in the parent' '
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(
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cd parent &&
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git commit --allow-empty -m foo &&
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head=$(git rev-parse HEAD) &&
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test_seq 1000 |
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sed "s,.*,update refs/heads/& $head," |
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$MODERN_GIT update-ref --stdin
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)
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'
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test_expect_success 'create many packs in the child' '
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(
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cd child &&
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setup_many_packs
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)
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'
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test_perf 'fetch' '
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# start at the same state for each iteration
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obj=$($MODERN_GIT -C parent rev-parse HEAD) &&
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(
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cd child &&
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$MODERN_GIT for-each-ref --format="delete %(refname)" refs/remotes |
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$MODERN_GIT update-ref --stdin &&
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rm -vf .git/objects/$(echo $obj | sed "s|^..|&/|") &&
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git fetch
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)
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'
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test_done
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