some small adjustments

README.md

@@ -19,9 +19,7 @@ iperf3  -i $PINTERVAL -R -t $PTIME -f k -c $PERFHOST
 - `-M` MByte/s
 
 
-There exists a [list of public iperf servers](https://iperf.fr/iperf-servers.php).
-
-
+There exists a [list of public iperf servers](https://iperf.fr/iperf-servers.php) but though it seemed quite recent as of today, none of the servers I tried did actually work.
 
 ## stdbuf
 

perfi.sh

@@ -1,8 +1,5 @@
 #!/bin/bash
  
-#function perfi()
-#{
- 
 ##
 ## usage: perfi   HOST    DURATION        INTERVAL
 ##
@@ -10,7 +7,7 @@
 ##
  
 ## hardcode stuff here:
-PERFHOST=${1:-"iperf.it-north.net"}     # default host
+PERFHOST=${1:-"your-iperf3-server.example.com"}     # default host
 PTIME=${2:-"20"}                # 20 seconds default
 PINTERVAL=${3:-"0.5"}           # 0.5 seconds interval
  
@@ -18,4 +15,3 @@ echo "Using $PERFHOST with test duration $PTIME and interval $PINTERVAL"
  
 stdbuf -o0 iperf3  -i $PINTERVAL -R -t $PTIME -f k -c $PERFHOST | stdbuf -o0 awk '/sec/&&!/receiver/&&!/sender/ {print $7}' | stdbuf -o0 feedgnuplot --lines --stream $PINTERVAL --ylabel 'Kbit/s' --xlabel  "$PINTERVAL seconds"
  
-#}