diff --git a/brozzler/browser.py b/brozzler/browser.py
index 88490c2..9c72589 100644
--- a/brozzler/browser.py
+++ b/brozzler/browser.py
@@ -200,6 +200,9 @@ class WebsockReceiverThread(threading.Thread):
         # ping_timeout is used as the timeout for the call to select.select()
         # in addition to its documented purpose, and must have a value to avoid
         # hangs in certain situations
+        #
+        # skip_ut8_validation is a recommended performance improvement:
+        # https://websocket-client.readthedocs.io/en/latest/faq.html#why-is-this-library-slow
         self.websock.run_forever(
             sockopt=((socket.IPPROTO_TCP, socket.TCP_NODELAY, 1),),
             ping_timeout=0.5,