# with suppressions 
=== result ===
total time: 55.0sec
max CPU: 109.1%
avg CPU: 1.37%
max Memory: 1.0%
avg Memory: .30%
max RSS: 168256KB
avg RSS: 49736.64KB
=== result ===
total time: 52.0sec
max CPU: 90.4%
avg CPU: 1.44%
max Memory: 1.0%
avg Memory: .28%
max RSS: 167744KB
avg RSS: 46318.16KB

# without suppressions
=== result ===
total time: 57.0sec
max CPU: 114.0%
avg CPU: 1.50%
max Memory: 1.0%
avg Memory: .26%
max RSS: 167952KB
avg RSS: 43129.38KB
=== result ===
total time: 52.0sec
max CPU: 85.1%
avg CPU: 1.29%
max Memory: 1.0%
avg Memory: .31%
max RSS: 171712KB
avg RSS: 52057.46KB

#!/bin/bash

start=$(date +%s.%N)

# RUN
yarn nx lint eslint-plugin --skip-nx-cache > /dev/null 2>&1 &
pid=$!

# Variables
max_cpu=0; max_mem=0; max_rss=0
total_cpu=0; total_mem=0; total_rss=0
sample_count=0

# Monitor
while true; do

    if ! kill -0 $pid 2>/dev/null; then
        break
    fi

    ps_info=$(ps -p $pid -o %cpu,%mem,rss 2>/dev/null | tail -1)
    if [ ! -z "$ps_info" ] && [ "$ps_info" != "%CPU" ]; then
        cpu=$(echo "$ps_info" | awk '{print $1}')
        mem=$(echo "$ps_info" | awk '{print $2}')
        rss=$(echo "$ps_info" | awk '{print $3}')

        # isNumber?
        if [[ "$cpu" =~ ^[0-9]+\.?[0-9]*$ ]] && [[ "$mem" =~ ^[0-9]+\.?[0-9]*$ ]] && [[ "$rss" =~ ^[0-9]+$ ]]; then
            [ $(echo "$cpu > $max_cpu" | bc -l) -eq 1 ] && max_cpu=$cpu
            [ $(echo "$mem > $max_mem" | bc -l) -eq 1 ] && max_mem=$mem
            [ $(echo "$rss > $max_rss" | bc -l) -eq 1 ] && max_rss=$rss
            total_cpu=$(echo "$total_cpu + $cpu" | bc -l)
            total_mem=$(echo "$total_mem + $mem" | bc -l)
            total_rss=$(echo "$total_rss + $rss" | bc -l)
            sample_count=$((sample_count + 1))
        fi
    fi
    sleep 0.5
done

wait $pid
end=$(date +%s.%N)
time=$(echo "$end - $start" | bc -l)

if [ $sample_count -gt 0 ]; then
    avg_cpu=$(echo "scale=2; $total_cpu / $sample_count" | bc -l)
    avg_mem=$(echo "scale=2; $total_mem / $sample_count" | bc -l)
    avg_rss=$(echo "scale=2; $total_rss / $sample_count" | bc -l)
else
    avg_cpu=0
    avg_mem=0
    avg_rss=0
fi

echo ""
echo ""
echo "=== result ==="
echo "total time: ${time}sec"
echo "max CPU: ${max_cpu}%"
echo "avg CPU: ${avg_cpu}%"
echo "max Memory: ${max_mem}%"
echo "avg Memory: ${avg_mem}%"
echo "max RSS: ${max_rss}KB"
echo "avg RSS: ${avg_rss}KB"