Way to Kill xmlrpc.php Execution?

This plugin is great in that it helps prevent hackers from abusing this endpoint, though I’ve found that even if this filter is set the script still takes a considerable amount of CPU/memory to execute. So, during a bot attack it quickly debilitates the server. Adding die; directly into the first line of xmlrpc.php seems to be the best solution in this case. It would be great if somehow this plugin could completely stop the execution of xmlrpc.php in a similar way.

https://www.ads-software.com/plugins/disable-xml-rpc/