throttle framerate to < 67 fps

HISTORY.md

@@ -53,6 +53,7 @@
     * fixed variadic AND/OR reporters library, thanks, Brian!
     * fixed a pen-size issue in the frequency distribution analysis' graph-plot block, thanks, Brian!
     * fixed block label color when expanding or inserting variadic infix slots
+    * framerate is throttled to < 67 fps
 * **Documentation Updates:**
     * updated contribution guidelines, thanks, Peter!
     * updated help screens for NUMBERS and FIND FIRST, thanks, Brian, Peter and WarpedWartWars!
@@ -60,6 +61,9 @@
 * **Translation Updates:**
     * German
 
+### 2022-07-23
+* throttle framerate to < 67 fps
+
 ### 2022-07-22
 * v8.0.0 release candidate
 

snap.html

@@ -37,7 +37,9 @@
         <script src="src/sha512.js?version=2019-06-27"></script>
         <script src="src/FileSaver.min.js?version=2019-06-27"></script>
         <script>
-            var world;
+            var world,
+                FPS = 67,
+                lastTime = 0;
             window.onload = function () {
                 if ('serviceWorker' in navigator) {
                     navigator.serviceWorker.register('sw.js');
@@ -46,9 +48,13 @@
                 new IDE_Morph().openIn(world);
                 loop();
 			};
-            function loop() {
+            function loop(timestamp) {
                 requestAnimationFrame(loop);
+                if (timestamp - lastTime < 1000 / FPS) {
+                    return;
+                }
                 world.doOneCycle();
+                lastTime = timestamp;
             }
         </script>
     </head>