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| author | Jeff Hostetler <jeffhost@microsoft.com> | 2017-04-19 17:06:15 +0000 |
|---|---|---|
| committer | Junio C Hamano <gitster@pobox.com> | 2017-04-19 20:33:01 -0700 |
| commit | 350d8701437f2d5031513bb45f1d14545d5a8911 (patch) | |
| tree | 109db27d65a337fffb62d8cf6f775c22af02e2f4 /t/perf/p0006-read-tree-checkout.sh | |
| parent | a6db3fbb6e4ec11695e2a3af8bc2cb9119cb1941 (diff) | |
| download | git-350d8701437f2d5031513bb45f1d14545d5a8911.tar.gz | |
p0006-read-tree-checkout: perf test to time read-tree
Created t/perf/repos/many-files.sh to generate large, but
artificial repositories.
Created t/perf/inflate-repo.sh to alter an EXISTING repo
to have a set of large commits. This can be used to create
a branch with 1M+ files in repositories like git.git or
linux.git, but with more realistic content. It does this
by making multiple copies of the entire worktree in a series
of sub-directories.
The branch name and ballast structure created by both scripts
match, so either script can be used to generate very large
test repositories for the following perf test.
Created t/perf/p0006-read-tree-checkout.sh to measure
performance on various read-tree, checkout, and update-index
operations. This test can run using either normal repos or
ones from the above scripts.
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 't/perf/p0006-read-tree-checkout.sh')
| -rwxr-xr-x | t/perf/p0006-read-tree-checkout.sh | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/t/perf/p0006-read-tree-checkout.sh b/t/perf/p0006-read-tree-checkout.sh new file mode 100755 index 0000000000..78cc23fe2f --- /dev/null +++ b/t/perf/p0006-read-tree-checkout.sh @@ -0,0 +1,67 @@ +#!/bin/sh +# +# This test measures the performance of various read-tree +# and checkout operations. It is primarily interested in +# the algorithmic costs of index operations and recursive +# tree traversal -- and NOT disk I/O on thousands of files. + +test_description="Tests performance of read-tree" + +. ./perf-lib.sh + +test_perf_default_repo + +# If the test repo was generated by ./repos/many-files.sh +# then we know something about the data shape and branches, +# so we can isolate testing to the ballast-related commits +# and setup sparse-checkout so we don't have to populate +# the ballast files and directories. +# +# Otherwise, we make some general assumptions about the +# repo and consider the entire history of the current +# branch to be the ballast. + +test_expect_success "setup repo" ' + if git rev-parse --verify refs/heads/p0006-ballast^{commit} + then + echo Assuming synthetic repo from many-files.sh + git branch br_base master + git branch br_ballast p0006-ballast^ + git branch br_ballast_alias p0006-ballast^ + git branch br_ballast_plus_1 p0006-ballast + git config --local core.sparsecheckout 1 + cat >.git/info/sparse-checkout <<-EOF + /* + !ballast/* + EOF + else + echo Assuming non-synthetic repo... + git branch br_base $(git rev-list HEAD | tail -n 1) + git branch br_ballast HEAD^ || error "no ancestor commit from current head" + git branch br_ballast_alias HEAD^ + git branch br_ballast_plus_1 HEAD + fi && + git checkout -q br_ballast && + nr_files=$(git ls-files | wc -l) +' + +test_perf "read-tree br_base br_ballast ($nr_files)" ' + git read-tree -m br_base br_ballast -n +' + +test_perf "switch between br_base br_ballast ($nr_files)" ' + git checkout -q br_base && + git checkout -q br_ballast +' + +test_perf "switch between br_ballast br_ballast_plus_1 ($nr_files)" ' + git checkout -q br_ballast_plus_1 && + git checkout -q br_ballast +' + +test_perf "switch between aliases ($nr_files)" ' + git checkout -q br_ballast_alias && + git checkout -q br_ballast +' + +test_done |