Created
September 16, 2022 15:05
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sshping - create ssh connect and measure character typing latency (send single character until it appears)
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#!/usr/bin/env python | |
# You may use this under an MIT license | |
from time import time, sleep | |
from signal import signal, SIGINT | |
import subprocess | |
import sys | |
def write_read(p): | |
a = time() | |
p.stdin.write(b"z") | |
assert p.stdout.read(1) == b"z" | |
return round(1000 * (time() - a), 1) | |
host = sys.argv[1] | |
p = subprocess.Popen(['ssh', host, 'cat'], | |
stdin=subprocess.PIPE, stdout=subprocess.PIPE, bufsize=0) | |
times = [] | |
def finish(*args): | |
avg1 = round(sum(times) / len(times), 1) | |
avg2 = round(sum(times[1:]) / (len(times)-1), 1) | |
print("\nAverage (including first): %s ms" % avg1) | |
print("Average (not including first): %s ms" % avg2) | |
sys.exit(0) | |
signal(SIGINT, finish) | |
first = True | |
while True: | |
ms = write_read(p) | |
times.append(ms) | |
if len(times) == 0: | |
note = " (including connect time)" | |
else: | |
note = "" | |
print("1 char to/from %s: %s ms%s" % (host, ms, note)) | |
sleep(1) |
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