test_hypercore_peers.sh

#!/bin/bash

IPS=(
64.31.48.111
64.31.51.137
180.189.55.18
180.189.55.19
34.84.25.59
34.146.230.150
13.230.78.76
54.248.41.39
52.68.71.160
13.114.116.44
79.127.159.173
79.127.159.174
23.81.40.69
157.90.207.92
109.123.230.189
31.223.196.172
31.223.196.238
91.134.71.237
57.129.140.247
67.213.123.85
72.46.87.141
199.254.199.12
199.254.199.54
45.250.255.111
109.94.99.131
23.81.41.3
15.235.231.247
199.254.199.48
199.254.199.52
15.235.232.101
54.168.150.28
54.64.2.87
52.193.108.65
54.65.106.241
54.238.174.48
18.180.228.50
57.181.193.239
35.190.230.32
54.199.122.133
13.158.244.192
43.207.77.116
35.79.116.97
13.158.102.147
116.199.229.233
35.72.88.240
45.76.206.35
218.33.8.227
35.77.205.141
)

TMP_RESULT="nc_results.txt"
> "$TMP_RESULT"

for IP in "${IPS[@]}"; do
    SUM=0
    CNT=0
    for i in {1..10}; do
        # Use Bash 'time' and parse elapsed time via TIMEFORMAT
        {
            TIMEFORMAT=%R
            T=$( { time nc -vz -w 2 "$IP" 4001 >/dev/null 2>&1; } 2>&1 )
        }
        # Only count on successful connection (nc returns 0)
        if [ $? -eq 0 ] && [[ $T =~ ^[0-9]+(\.[0-9]+)?$ ]]; then
            SUM=$(echo "$SUM + $T" | bc)
            CNT=$((CNT+1))
        fi
    done
    if [ "$CNT" -gt 0 ]; then
        AVG=$(echo "scale=4; $SUM / $CNT" | bc)
    else
        AVG="NaN"
    fi
    printf "%s %s (%s/%s)\n" "$AVG" "$IP" "$CNT" 10 >> "$TMP_RESULT"
    echo "Tested $IP: avg=${AVG}s ($CNT/10 successes)"
done

echo -e "\n=== Sorted Results (Fastest to Slowest, avg seconds per connect) ==="
sort -n "$TMP_RESULT"