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#!/usr/bin/env bash
#
# benchmark - benchmarking git-restore-mtime
#
# This file is part of git-tools, see <https://github.com/MestreLion/git-tools>
# Copyright (C) 2022 Rodrigo Silva (MestreLion) <linux@rodrigosilva.com>
# License: GPLv3 or later, at your choice. See <http://www.gnu.org/licenses/gpl>
#------------------------------------------------------------------------------
here="${0%/*}"
case "${1:-}" in
touch) cmd=( touch-all );;
min) cmd=( "$here"/git-restore-mtime-min );;
utimes) cmd=( "$here"/git-utimes );;
*) cmd=( "$here"/../git-restore-mtime "$@" );;
esac
# flush() could be more complete: https://stackoverflow.com/a/44266604/624066
flush() { sync; echo 3 | sudo tee /proc/sys/vm/drop_caches > /dev/null; }
touch-all() { i=0; while IFS= read -r file; do ((i++)); touch "$file";
done < <(git ls-files); echo "$i files"; }
# touch variations, only works if [[ $(find . -name '* *' | wc -l) == 0 ]]
touch-for() ( i=0; for file in $(git ls-files); do ((i++)); touch "$file";
done; echo "$i files"; )
touch-min() ( for file in $(git ls-files); do touch "$file"; done; )
touch-all
git status >/dev/null 2>&1 # for the linux kernel
flush
time { "${cmd[@]}"; }
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