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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
```
""" Main """
    argument_spec = vmware_argument_spec()
    argument_spec.update(
        name=dict(type='str'),
        datacenter=dict(type='str', aliases=['datacenter_name']),
        cluster=dict(type='str'),
        gather_nfs_mount_info=dict(type='bool', default=False),
        gather_vmfs_mount_info=dict(type='bool', default=False)
    )
    module = AnsibleModule(argument_spec=argument_spec,
                           supports_check_mode=True
                           )
    result = dict(changed=False)
    pyv = PyVmomiHelper(module)
    if module.params['cluster']:
        dxs = pyv.lookup_datastore_by_cluster()
    elif module.params['datacenter']:
        dxs = pyv.lookup_datastore(confine_to_datacenter=True)
    else:
        dxs = pyv.lookup_datastore(confine_to_datacenter=False)
    vmware_host_datastore = VMwareHostDatastore(module)
    datastores = vmware_host_datastore.build_datastore_list(dxs)
    result['datastores'] = datastores
    module.exit_json(**result)
if __name__ == '__main__':
    main()