Note for Sphinx and XFES users
Sphinx and XenForo Enhanced Search (XFES) are designed to speed up default forum search; however,
neither significantly improves search quality. Like default forum search, Sphinx is full text
search. XFES is based on elasticsearch, which offers better stemming, but uses a simple index that
basically results in faster full text search.) In addition, Sphinx and XFES require manual setup and
ongoing maintenance, and XFES requires additional programming to tune ranking.