Is opening new tab in the terminal window is equivalent to opening a new tab in terms of resources? I need to run 16 scripts in parallel. I do not know whether opening tabs or new terminals is the best practice? I want to get the maximum performance but without exhausting the resources to an extent that degrades the performance.
I think, it is close the same. I cannot judge if opening more windows with terminal take more resources than one window with more tabs, but the window object take CPU time only while changing. You can test the performance with command
cp /dev/zero /dev/null what takes 100% of one core (this is a simple load test). Run more such commands in more terminals and look at
top or KSysGuard to see the result. I hope you have at least 16 cores for that.