This update catches up with Relevanssi Premium 1.10.11. It includes the following fixes:
Fuzzy searches are now a lot more efficient; they were a huge resource hog before.
Fixed a possible MySQL injection attack.
Fixed MySQL errors from empty meta queries.
Sort order (orderby and order variables) are now read from query variables instead of global variables.
Relevanssi will not choke on bad values of orderby anymore.
Limit searches is improved: when using AND search it is less likely to miss results.
Phrase recognition read the whole post content (which it didn’t need) from database, causing memory issues in some cases. Fixed that.
Highlighting was broken, and should work much better now.
After you update the plugin, please deactivate the plugin and activate it again.
WP repository plugin page.