Linuxカーネルソースのgrep、ripgrp(rg)、git grepベンチ用シェルスクリプト

bench.sh

#!/bin/sh

echo_and_do () {
    echo $ "$1"
    eval "$1"
}

echo ===============================================
echo grep, ripgrep, git grep benchmark\(by cygwin environment\)
echo ===============================================

echo "*** 注意点 ***********************************************************************************"
echo Windows上で動作させているため、git grepと差異があります。
echo \(予約名\(aux.c, aux.h\)、大文字小文字違い\(xt_rateest.c, xt_RATEEST.c, etc\)がcheckout出来ない\)
echo "**********************************************************************************************"
#echo_and_do "git status"

ncpu_plus1=`expr $(cat /proc/cpuinfo | grep processor | wc -l) + 1`
echo ncpu + 1: $ncpu_plus1


echo -n warm-up start
grep     -lr EXPORT_SYMBOL_GPL . --exclude-dir=.git > /dev/null
echo -n .
rg       -l  EXPORT_SYMBOL_GPL .                    > /dev/null
echo -n .
git grep -l  EXPORT_SYMBOL_GOL                      > /dev/null
echo -n .
find . \( -type d -name .git -prune -wholename .git \) -o -type f > /dev/null
echo done

echo_and_do "grep --version | head -n 1"
echo_and_do "rg --version"
echo_and_do "git --version"
echo -----
echo_and_do "time grep     -lr EXPORT_SYMBOL_GPL . --exclude-dir=.git    | wc -l"
echo_and_do "time rg       -l  EXPORT_SYMBOL_GPL .                       | wc -l"
echo_and_do "time rg       -l  EXPORT_SYMBOL_GPL . -j `expr $ncpu_plus1` | wc -l"
echo_and_do "time git grep -l  EXPORT_SYMBOL_GPL                         | wc -l"
echo -----
echo_and_do "time find . \( -type d -name .git -prune -wholename .git \) -o -type f | wc -l"
echo -----
echo_and_do "time find . \( -type d -name .git -prune -wholename .git \) -o -type f | xargs grep -l EXPORT_SYMBOL_GPL | wc -l"
echo -----
echo "*** mistake(slowly) ***"
echo_and_do "time find . \( -type d -name .git -prune -wholename .git \) -o -type f | xargs rg   -l EXPORT_SYMBOL_GPL | wc -l"