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350d870143
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>
68 lines
2 KiB
Bash
Executable file
68 lines
2 KiB
Bash
Executable file
#!/bin/sh
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#
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# This test measures the performance of various read-tree
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# and checkout operations. It is primarily interested in
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# the algorithmic costs of index operations and recursive
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# tree traversal -- and NOT disk I/O on thousands of files.
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test_description="Tests performance of read-tree"
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. ./perf-lib.sh
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test_perf_default_repo
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# If the test repo was generated by ./repos/many-files.sh
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# then we know something about the data shape and branches,
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# so we can isolate testing to the ballast-related commits
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# and setup sparse-checkout so we don't have to populate
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# the ballast files and directories.
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#
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# Otherwise, we make some general assumptions about the
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# repo and consider the entire history of the current
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# branch to be the ballast.
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test_expect_success "setup repo" '
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if git rev-parse --verify refs/heads/p0006-ballast^{commit}
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then
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echo Assuming synthetic repo from many-files.sh
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git branch br_base master
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git branch br_ballast p0006-ballast^
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git branch br_ballast_alias p0006-ballast^
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git branch br_ballast_plus_1 p0006-ballast
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git config --local core.sparsecheckout 1
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cat >.git/info/sparse-checkout <<-EOF
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/*
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!ballast/*
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EOF
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else
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echo Assuming non-synthetic repo...
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git branch br_base $(git rev-list HEAD | tail -n 1)
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git branch br_ballast HEAD^ || error "no ancestor commit from current head"
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git branch br_ballast_alias HEAD^
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git branch br_ballast_plus_1 HEAD
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fi &&
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git checkout -q br_ballast &&
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nr_files=$(git ls-files | wc -l)
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'
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test_perf "read-tree br_base br_ballast ($nr_files)" '
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git read-tree -m br_base br_ballast -n
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'
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test_perf "switch between br_base br_ballast ($nr_files)" '
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git checkout -q br_base &&
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git checkout -q br_ballast
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'
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test_perf "switch between br_ballast br_ballast_plus_1 ($nr_files)" '
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git checkout -q br_ballast_plus_1 &&
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git checkout -q br_ballast
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'
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test_perf "switch between aliases ($nr_files)" '
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git checkout -q br_ballast_alias &&
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git checkout -q br_ballast
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'
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test_done
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