Quick and dirty listing of CPU used, grouped by process

#!/bin/bash
# Quick and dirty listing of CPU used, grouped by process with the same name (maybe different pid or even path!)

IFS=$'\n'
foundheader=0

unset foundNames
declare -A foundNames

for line in $(top -b -n 1); do
    if echo "$line" | grep "PID.*USER.*PR"; then
        foundheader=1
        continue
    fi
    if [ $foundheader = 0 ]; then
        continue
    fi

    #echo "line is $line"
    name=$(echo "$line" | awk '{print $12}')
    cpu=$(echo "$line" | awk '{print $9}')

    oldCpu=${foundNames["$name"]}
    let newCpu=cpu+oldCpu

    #echo "name $name, cpu $cpu, oldCpu $oldCpu, newCpu $newCpu"

    foundNames["$name"]="$newCpu"
done

for key in ${!foundNames[@]}; do
    value=${foundNames[$key]}
    if [ "$value" = 0 ]; then
        continue
    fi
    printf "%2d%% %s\n" "${value}" "$key"
done | sort -rn