From 2ccb8ec75cb880369fef938780ede5ede262f593 Mon Sep 17 00:00:00 2001
From: ansuz <ansuz@transitiontech.ca>
Date: Mon, 6 Jul 2020 15:30:27 -0400
Subject: [PATCH] throttle redraws of the slide content

draw no more than once every 400ms
---
 www/slide/inner.js | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/www/slide/inner.js b/www/slide/inner.js
index 4b1161b9a..4b7691ced 100644
--- a/www/slide/inner.js
+++ b/www/slide/inner.js
@@ -485,15 +485,19 @@ define([
         CodeMirror.init(framework.localChange, framework._.title, framework._.toolbar);
         CodeMirror.configureTheme(common);
 
+        var drawSlides = Util.throttle(function (content) {
+            Slide.update(content);
+        }, 400);
+
         framework.onContentUpdate(function (newContent) {
             CodeMirror.contentUpdate(newContent);
-            Slide.update(newContent.content);
+            drawSlides(newContent.content);
         });
 
         framework.setContentGetter(function () {
             CodeMirror.removeCursors();
             var content = CodeMirror.getContent();
-            Slide.update(content.content);
+            drawSlides(content.content);
             return content;
         });