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##### SUMMARY

Two vmware modules uses `copy()` to duplicate an internal instance of a pyvmomi object. This to be able to modify the object during an iteration.

- https://github.com/ansible/ansible/blob/622a493ae03bd5e5cf517d336fc426e9d12208c7/lib/ansible/modules/cloud/vmware/vmware_guest.py#L788
- https://github.com/ansible/ansible/blob/622a493ae03bd5e5cf517d336fc426e9d12208c7/lib/ansible/modules/cloud/vmware/vmware_datastore_facts.py#L220

As explain here, https://github.com/ansible/ansible/pull/60196/files#r312643761 this is not the best approach and this may impact the performance.

##### ISSUE TYPE
- Bug Report

##### COMPONENT NAME

vmware

##### ANSIBLE VERSION
<!--- Paste verbatim output from "ansible --version" between quotes -->
```paste below
devel
```
"""
        Function to return int value for given input, else return error
        Args:
            input_value: Input value to retrive int value from
            name:  Name of the Input value (used to build error message)
        Returns: (int) if integer value can be obtained, otherwise will send a error message.
        """
        if isinstance(input_value, int):
            return input_value
        elif isinstance(input_value, str) and input_value.isdigit():
            return int(input_value)
        else:
            self.module.fail_json(msg='"%s" attribute should be an'
                                  ' integer value.' % name)
class PyVmomiCache(object):