`mapdl.exit` can be slow

[germa89]

I detected this while running on dev container. This method has become quite hacky. I should probably have a look at it eventually.

[germa89]

Things to consider: https://stackoverflow.com/questions/21053380/what-does-del-do-exactly

Having multiple references to MAPDL itself might be a performance penalty and might avoid killing MAPDL on time.

Stack Overflow

What does "del" do exactly?

Here is my code:

from memory_profiler import profile

@Profile
def mess_with_memory():
huge_list = range(20000000)
del huge_list
print "why this kolaveri di?"
This is what the output ...

[germa89]

Removing:

        try:
            self.exit(force=True)
        except Exception as e:
            pass

        # Adding super call per:
        # https://docs.python.org/3/reference/datamodel.html#object.__del__
        try:
            super().__del__()
        except Exception as e:
            pass

to speed up the deletion from #3497.

[germa89]

More stuff to consider later:

@patch("ansys.mapdl.core.Mapdl.__init__", lambda *args, **kwargs: None)
def test_delete_mapdl_object():
    mapdl_b = pymapdl.Mapdl()
    mapdl_b._mapdl_on_hpc = True

    with patch("ansys.mapdl.core.mapdl_grpc.MapdlGrpc.kill_job") as mock_exit:
        del mapdl_b
        mock_exit.assert_called_once()

[germa89]

Related to #3462