how to reduce the time for code execution?

Question

import ipaddress
import os
ipnet=ipaddress.ip_network('192.12.0.0/24')
for i in ipnet.hosts():
response=os.system('ping -c 1 ' + str(i))
if response == 0:
print(i, " alive")
else:
print(i, " down")
This is a script for ping whether the host is up or not. But the ping executes very slowly one by one per host or IP. Should I use multi threading or anything else? Isn't it possible to get output quickly?

Answer 1

provided that your code is ok first I'd check internet speed, then the machine for overloading. processors are light years faster then network infrastructure, especially in home use

Answer 2

never heard about parallel internet protocol in common use. I still believe u have a mess in machine and os/card configuration and a slow internet connection. true parallel pinging requires several machines and subsets of pinged address. in general speeds relate to computer speeds and network speeds. what's the point in having a strong machine and a dial-in access + pinged servers in the other hemisphere.
true parallel processing consists of chunks of algorithm processed by different cores inside a single infrastructure

Answer 3

I am not saying your code is ok. It's not. For example -c should be replaced by -n.
I am just saying if you want true parallel execution you need at least two machines and two internet connections.

I did this, in windows, Python 3.xx

import os

flag = 0
flag = os.system( "ping -n 1 8.8.8.8 > null")
if flag == 0:
print ("up")
else:
print ("down")

As I expected in my previous posts there is a significant difference in speed of execution. In console it took ca. 22ms. but in Python nearly 4s.
If you need speed write it in ANSI C.

Answer 4

In my script, the aim is to check which of the hosts(IP) are up and which of them are down. How can I check this status in parallel? Currently, the script checks one by one and it takes lots of time to check all the hosts under the given network (192.12.0.0/24)

Answer 5

thanks skipper for your continuous responses.
So you are saying that I written my script correctly for my requirement. If you could execute my code from your machine to ping a network, that will be great.