Calculate average time for browser start at selenium nodes in docker containers filtered by name

browser_start_time.sh

#!/bin/bash

REGEX_URL="\[get\: https://mail.ru/"

container_time() {
# echo "Looking in: $OUTPUT"
readarray -t array <<< "$(docker logs "$1" | egrep " INFO - (Executing|Done)\: $REGEX_URL"))"
seconds_total=0
i=0

for ((index=0; index <= ${#array[@]}; index++));
 do
   if [[ "${array[index]}" == *"Executing:"* && "${array[index+1]}" == *"Done:"* ]]; then
        date1=${array[index]}
        date2=${array[index+1]}
        seconds=$(( ( $(date -ud "${date2% INFO *}" +'%s') - $(date -ud "${date1% INFO *}" +'%s') ) ))
        if [[ -z "$2" ]] ; then
        echo "$seconds seconds"
        fi
    # echo $(( ( $(date -ud "${date2% INFO *}" +'%s') - $(date -ud "${date1% INFO *}" +'%s') ) )) seconds
        seconds_total=$((seconds_total+seconds))
        i=$((i+1))
   fi
 done

if [[ $i -gt 0 ]] ;
then echo "Average value for $1 is: $((seconds_total / i)) seconds"
else echo "Average value for $1 is: none"
fi
}

node_time() {
for OUTPUT in $(docker ps -q -f name=node)
 do
container_time "$OUTPUT" false
done
}

"$@"