mjhjmtu

I need to run a python script that performs TLS socket connections to a list addresses. I need to finish the task as soon as possible. I plan to run 16 terminals, each terminal is running a script (each script goes in a loop to connect to the addresses). The script is sequential and perform one TLS connection at a time. Does this number degrades the device's performance or can cause network traffic loss? Of course I do not want to cause losses.
My device is running Ubuntu 18 64-bit in 8 GB RAM, Intel® Core™ i5-6500 CPU @ 3.20GHz × 4.

That's impossible to answer!

Technically any task degrades performances, but that's probably not what you want to know.

It depends a lot on the specific task and what else the machine is doing. My guess would be that you can do what you plan.

And a minor detail: There's no such thing as "Ubuntu 18", there's 18.04 and later this month 18.10 should come - but if you can make that mistake you probably aren't testing 18.10, so I'm guessing you mean 18.04 - And it doesn't matter!