1 files changed, 4 insertions, 0 deletions
diff --git a/lib/PublicInbox/Search.pm b/lib/PublicInbox/Search.pm
index b1e62f4c..eae10d8e 100644
--- a/lib/PublicInbox/Search.pm
+++ b/lib/PublicInbox/Search.pm
@@ -24,6 +24,10 @@ sub load_xapian () {
  
                  # n.b. FLAG_PURE_NOT is expensive not suitable for a public
                  # website as it could become a denial-of-service vector
+                # FLAG_PHRASE also seems to cause performance problems
+                # sometimes.
+                # TODO: make this an option, maybe?
+                # or make indexlevel=medium as default
                  FLAG_PHRASE()|FLAG_BOOLEAN()|FLAG_LOVEHATE()|FLAG_WILDCARD();
          };
  };