Also for doubleSided stress test sorting helps.

examples/webgl_lights_pointlights2.html

@@ -226,8 +226,6 @@
 				renderer.gammaOutput = true;
 				renderer.physicallyBasedShading = true;
 
-				renderer.sortObjects = true;
-
 				// STATS
 
 				stats = new Stats();

examples/webgl_performance_doublesided.html

@@ -116,7 +116,6 @@
 
 				renderer = new THREE.WebGLRenderer( { clearColor: 0x050505, clearAlpha: 1, antialias: FANCY } );
 				renderer.setSize( SCREEN_WIDTH, SCREEN_HEIGHT );
-				renderer.sortObjects = false;
 
 				renderer.gammaInput = true;
 				renderer.gammaOutput = true;