sh-benchmark.zsh

#!/bin/zsh

set -u
emulate -R ksh

sudo renice -10 $$ >/dev/null

time2sec() {
    local time="$1"
    shift
    local sep="${1-:}"

    local min="${time%%[:m]*}"
    local sec="${time##*[:m]}"
    if [[ $sec = $time ]]; then
        echo "$time"
    else
        let 'sec+=min*60'
        echo "$sec"
    fi
}

time_normalize() {
    local line

    while IFS= read -r line; do
        case "$line" in
        *\ total)
            local real user system
            real="${line%% total}"
            real="${real##* }"
            user="${line%%s user *}"
            user="${user##* }"
            system="${line%%s system *}"
            system="${system##* }"
            echo "$(time2sec $real) $(time2sec $user) $(time2sec $system)"
            ;;
        real\	* | user\	* | sys\	*)
            local minsec
            minsec="${line%s}"
            echo -n "$(time2sec "${minsec##*	}") "
            ;;
        *)
            if [[ -n $line ]]; then
                echo "$line" 1>&2
            fi
            ;;
        esac
    done
}

shells=(bash ksh zsh)

tput setaf 3
# echo -n '|'
for shell in "${shells[@]}"; do
    printf ' %-5s |' "$shell"
done
echo " Test"
tput sgr0

typeset -A real
typeset -A user
typeset -A sys

cat /Users/shinokada/bin/sh-benchmark-scripts |
    while read -r script; do
        if [[ -z ${script##\#*} ]]; then
            test_name="${script#* }"
            continue
        fi

        # echo -n '|'
        for shell in "${shells[@]}"; do
            shell_path="/bin/${shell}"
            if [[ $shell = 'zsh' ]]; then
                shell_name="/bin/ksh"
            else
                shell_name="$shell_path"
            fi
            env - "$shell_path" -c "$script" "$shell_name" 2>&1 |
                time_normalize |
                read real[$shell] user[$shell] sys[$shell] \
                ;
            if [[ ${real[${shells[0]}]} -gt 0.0 ]]; then
                ratio=$(printf '%6.1f' $((real[$shell] / real[${shells[0]}] * 100)))
            else
                ratio=$(printf '%6s' -)
            fi
            printf '%6.1f |' "$ratio"
        done

        tput setaf 4
        echo " $test_name"
        tput sgr0
    done