Merge pull request #96096 from facebookexperimental/spinner-perf

Throttle status bar spinner animations to save CPU

src/vs/base/browser/ui/codicons/codicon/codicon-animations.css

@@ -10,5 +10,6 @@
 }
 
 .codicon-animation-spin {
-	animation: codicon-spin 1.5s linear infinite;
+	/* Use steps to throttle FPS to reduce CPU usage */
+	animation: codicon-spin 1.5s steps(30) infinite;
 }

src/vs/base/browser/ui/tree/media/tree.css

@@ -61,5 +61,6 @@
 }
 
 .monaco-tl-twistie.codicon-tree-item-loading::before {
-	animation: codicon-spin 1.25s linear infinite;
+	/* Use steps to throttle FPS to reduce CPU usage */
+	animation: codicon-spin 1.25s steps(30) infinite;
 }