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