diff --git a/config/khronos.css b/config/khronos.css
index 2530f3d37..6de1ed919 100644
--- a/config/khronos.css
+++ b/config/khronos.css
@@ -730,3 +730,9 @@ li > p > a[id^="VUID-"].link { color: black; text-decoration: none; }
 li > p > a[id^="VUID-"].link:hover { color: black; }
 
 .vuid { color: #4d4d4d; font-family: monospace; }
+
+/* Improve page rendering performance */
+/* contain-intrinsic-size is the approximate average height of all sections */
+.sect1 { content-visibility: auto; contain-intrinsic-size: 98000px; }
+
+.sect2 { content-visibility: auto; contain-intrinsic-size: 13000px; }