From ef922fa3555a5e0b11eb28f126ebfd3c2e7347fa Mon Sep 17 00:00:00 2001
From: Brad Grantham <grantham@plunk.org>
Date: Mon, 20 Jan 2020 23:11:39 -0800
Subject: [PATCH] fix steady slowdown

---
 interface.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/interface.cpp b/interface.cpp
index 495e0e6..899e6b4 100644
--- a/interface.cpp
+++ b/interface.cpp
@@ -1734,10 +1734,12 @@ void map_history_to_lines(const ModeHistory& history, unsigned long long current
         map_mode_to_lines(current, byte2);
     }
 
-    if(!history.empty())
+    if(!history.empty()) {
         most_recent_modepoint = history[history.size() - 1];
+    }
 
     map_mode_to_lines(most_recent_modepoint, current_byte);
+    most_recent_modepoint = { current_byte, get<1>(most_recent_modepoint) };
 }
 
 void iterate(const ModeHistory& history, unsigned long long current_byte, float megahertz)