3 # This test measures the performance of various read-tree
4 # and checkout operations. It is primarily interested in
5 # the algorithmic costs of index operations and recursive
6 # tree traversal -- and NOT disk I/O on thousands of files.
8 test_description="Tests performance of read-tree"
12 test_perf_default_repo
14 # If the test repo was generated by ./repos/many-files.sh
15 # then we know something about the data shape and branches,
16 # so we can isolate testing to the ballast-related commits
17 # and setup sparse-checkout so we don't have to populate
18 # the ballast files and directories.
20 # Otherwise, we make some general assumptions about the
21 # repo and consider the entire history of the current
22 # branch to be the ballast.
24 test_expect_success "setup repo" '
25 if git rev-parse --verify refs/heads/p0006-ballast^{commit}
27 echo Assuming synthetic repo from many-files.sh
28 git branch br_base master
29 git branch br_ballast p0006-ballast^
30 git branch br_ballast_alias p0006-ballast^
31 git branch br_ballast_plus_1 p0006-ballast
32 git config --local core.sparsecheckout 1
33 cat >.git/info/sparse-checkout <<-EOF
38 echo Assuming non-synthetic repo...
39 git branch br_base $(git rev-list HEAD | tail -n 1)
40 git branch br_ballast HEAD^ || error "no ancestor commit from current head"
41 git branch br_ballast_alias HEAD^
42 git branch br_ballast_plus_1 HEAD
44 git checkout -q br_ballast &&
45 nr_files=$(git ls-files | wc -l)
48 test_perf "read-tree br_base br_ballast ($nr_files)" '
49 git read-tree -m br_base br_ballast -n
52 test_perf "switch between br_base br_ballast ($nr_files)" '
53 git checkout -q br_base &&
54 git checkout -q br_ballast
57 test_perf "switch between br_ballast br_ballast_plus_1 ($nr_files)" '
58 git checkout -q br_ballast_plus_1 &&
59 git checkout -q br_ballast
62 test_perf "switch between aliases ($nr_files)" '
63 git checkout -q br_ballast_alias &&
64 git checkout -q br_ballast