+.BI \-H " hash_size"
+Use a hashtable having the specified number of entries for storing the
+directories entries instead of a linked list. This hashtable will
+considerably speed up inode lookups (visible especially in interactive
+mode when adding/removing files from the restore list), but at the
+price of much more memory usage. The default value is 1, meaning no
+hashtable is used.
+.TP