Am 05.04.2017 um 19:38 schrieb g...@jeffhostetler.com:
> From: Jeff Hostetler <jeffh...@microsoft.com>
>
> Signed-off-by: Jeff Hostetler <jeffh...@microsoft.com>
> ---
> t/perf/p0004-read-tree.sh | 116
> ++++++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 116 insertions(+)
> create mode 100755 t/perf/p0004-read-tree.sh
>
> diff --git a/t/perf/p0004-read-tree.sh b/t/perf/p0004-read-tree.sh
> new file mode 100755
> index 0000000..5d8bbf5
> --- /dev/null
> +++ b/t/perf/p0004-read-tree.sh
> @@ -0,0 +1,116 @@
> +#!/bin/sh
> +
> +test_description="Tests performance of read-tree"
> +
> +. ./perf-lib.sh
> +
> +test_perf_default_repo
> +test_checkout_worktree
> +
> +## usage: dir depth width files
> +make_paths () {
> + for f in $(seq $4)
> + do
> + echo $1/file$f
> + done;
> + if test $2 -gt 0;
> + then
> + for w in $(seq $3)
> + do
> + make_paths $1/dir$w $(($2 - 1)) $3 $4
> + done
> + fi
> + return 0
> +}
"make_paths xxx_dir_xxx 5 10 9" takes more than a minute for me.
Providing its results as a file would be quicker but less flexible.
The following command prints the same result in less than a second.
awk -v dir=xxx_dir_xxx -v depth=5 -v width=10 -v files=9 '
function make_paths(dir, depth, width, files, i)
{
for (i = 1; i <= files; i++) {
print dir "/file" i
}
if (depth > 0) {
for (i = 1; i <= width; i++) {
make_paths(dir "/dir" i, depth - 1,
width, files)
}
}
}
END {make_paths(dir, depth, width, files)}
' </dev/null
It's faster because it avoids calling seq thousands of times.
> +
> +fill_index () {
> + make_paths $1 $2 $3 $4 |
> + sed "s/^/100644 $EMPTY_BLOB /" |
You could add the prefix to the script above and avoid this sed call
as well.
René
