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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>
111 lines
2.9 KiB
Bash
Executable file
111 lines
2.9 KiB
Bash
Executable file
#!/bin/sh
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# Generate test data repository using the given parameters.
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# When omitted, we create "gen-many-files-d-w-f.git".
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#
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# Usage: [-r repo] [-d depth] [-w width] [-f files]
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#
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# -r repo: path to the new repo to be generated
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# -d depth: the depth of sub-directories
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# -w width: the number of sub-directories at each level
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# -f files: the number of files created in each directory
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#
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# Note that all files will have the same SHA-1 and each
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# directory at a level will have the same SHA-1, so we
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# will potentially have a large index, but not a large
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# ODB.
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#
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# Ballast will be created under "ballast/".
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EMPTY_BLOB=e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
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set -e
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# (5, 10, 9) will create 999,999 ballast files.
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# (4, 10, 9) will create 99,999 ballast files.
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depth=5
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width=10
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files=9
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while test "$#" -ne 0
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do
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case "$1" in
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-r)
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shift;
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test "$#" -ne 0 || { echo 'error: -r requires an argument' >&2; exit 1; }
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repo=$1;
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shift ;;
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-d)
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shift;
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test "$#" -ne 0 || { echo 'error: -d requires an argument' >&2; exit 1; }
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depth=$1;
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shift ;;
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-w)
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shift;
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test "$#" -ne 0 || { echo 'error: -w requires an argument' >&2; exit 1; }
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width=$1;
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shift ;;
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-f)
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shift;
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test "$#" -ne 0 || { echo 'error: -f requires an argument' >&2; exit 1; }
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files=$1;
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shift ;;
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*)
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echo "error: unknown option '$1'" >&2; exit 1 ;;
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esac
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done
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# Inflate the index with thousands of empty files.
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# usage: dir depth width files
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fill_index() {
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awk -v arg_dir=$1 -v arg_depth=$2 -v arg_width=$3 -v arg_files=$4 '
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function make_paths(dir, depth, width, files, f, w) {
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for (f = 1; f <= files; f++) {
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print dir "/file" f
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}
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if (depth > 0) {
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for (w = 1; w <= width; w++) {
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make_paths(dir "/dir" w, depth - 1, width, files)
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}
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}
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}
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END { make_paths(arg_dir, arg_depth, arg_width, arg_files) }
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' </dev/null |
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sed "s/^/100644 $EMPTY_BLOB /" |
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git update-index --index-info
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return 0
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}
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[ -z "$repo" ] && repo=gen-many-files-$depth.$width.$files.git
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mkdir $repo
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cd $repo
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git init .
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# Create an initial commit just to define master.
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touch many-files.empty
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echo "$depth $width $files" >many-files.params
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git add many-files.*
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git commit -q -m params
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# Create ballast for p0006 based upon the given params and
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# inflate the index with thousands of empty files and commit.
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git checkout -b p0006-ballast
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fill_index "ballast" $depth $width $files
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git commit -q -m "ballast"
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nr_files=$(git ls-files | wc -l)
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# Modify 1 file and commit.
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echo "$depth $width $files" >>many-files.params
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git add many-files.params
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git commit -q -m "ballast plus 1"
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# Checkout master to put repo in canonical state (because
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# the perf test may need to clone and enable sparse-checkout
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# before attempting to checkout a commit with the ballast
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# (because it may contain 100K directories and 1M files)).
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git checkout master
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echo "Repository "$repo" ($depth, $width, $files) created. Ballast $nr_files."
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exit 0
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