Escape _ in the input parameters as otherwise we spend a lot of time doing...

Escape _ in the input parameters as otherwise we spend a lot of time doing very expensive LIKE operations

modules/Bio/EnsEMBL/DBSQL/BaseAlignFeatureAdaptor.pm

@@ -267,6 +267,7 @@ sub fetch_all_by_hit_name_unversioned {
   if ( !defined($hit_name) ) {
     throw("hit_name argument is required");
   }
+  $hit_name =~ s/_/\\_/;
 
   #construct a constraint like 't1.hit_name = "123"'
   my @tabs = $self->_tables;