Hilfe bei Shell-Skript Erstellung

#!/bin/bash
#


echo --------------------


T="$(date +%s)"


# Dein Code Anfang


# Beispiel: warte 62 Sek.


sleep 62


# Dein Code Ende


T="$(($(date +%s)-T))"


echo "Sekunden total: ${T}"


echo "Tage : Stunden : Minuten : Sekunden"
printf "$((T/86400)) : $((T/3600%24)) : $((T/60%60)) : $((T%60))\n"


# Kopie in eine Datei:
echo "$(date) --- Sekunden total: ${T}" >> get_time.dat


echo --------------------


# --- end of script ---

#!/bin/bash
#


T1="$(date +%s%N)" # nano seconds


echo -------------------- Dein Code Anfang


n=1000000  # number of loops


i=1;
j=1;
while [ $i -lt $n ]; do
  (( j = j + 1 )); ((i = i + 1 )); done;


echo $j


echo -------------------- Dein Code Ende


T2="$(($(date +%s%N)-T1))" # delta in nano seconds


echo "nano seconds total: ${T2}"


echo "min : sec : nano-sec"
printf "$((T2/60000000000%60)) : $((T2/1000000000%60)) : $((T2%1000000000))\n"


# Kopie in eine Datei:
echo "$(date) --- nano seconds total: ${T2}" >> get_time.dat


# --- end of script ---

#!/bin/bash
#


T1="$(date +%s%N)" # nano seconds


echo -------------------- Dein Code Anfang


n=1000000  # number of loops


i=1;
j=1;
while [ $i -lt $n ]; do
  (( j = j + 1 )); ((i = i + 1 )); done;


echo $j


echo -------------------- Dein Code Ende


T2="$(($(date +%s%N)-T1))" # delta in nano-seconds
T3="$((T2/1000))"          # delta in micro-seconds
T4="$((T3/1000))"          # delta in milli-seconds
T5="$((T4/1000))"          # delta in seconds
T6="$((T5/60))"            # delta in minutes


echo " nano seconds total: ${T2}"
echo "micro seconds total: ${T3}"
echo "milli seconds total: ${T4}"
echo "      seconds total: ${T5}"
echo "      minutes total: ${T6}"


# Kopie in eine Datei:
echo "$(date) --- milli seconds total: ${T4}" >> get_time.dat


# --- end of script ---