Hi.
I don’t know how works, but I was using this feature included in magento extension from 5 years ago without server issues:
https://mirasvit.com/magento-extensions/sphinx-search-ultimate.html
I am not using sphinx server, only using his own internal search engine and works like a charm.
I try to say you, that is old featured implemented in some plugins/extensions/modules for different CMS and can be added as a very usefull option for your plugin.
If in case of worpdress use many resources, maybe you simply need to add a message that is a very resource heavy operation and that is not recommended to enable for shared hostings.
Thank you to have in consideration.
Regards.