diff --git a/openbr/plugins/gallery/lmdb.cpp b/openbr/plugins/gallery/lmdb.cpp
index d30e6bd..6ca9e37 100644
--- a/openbr/plugins/gallery/lmdb.cpp
+++ b/openbr/plugins/gallery/lmdb.cpp
@@ -180,6 +180,9 @@ class lmdbGallery : public Gallery
             lock.unlock();
 
             aThread.waitForFinished();
+
+            if (data.size() > 10000)
+                QThread::msleep(1);
         }
     }