Stop using profiling wrongly. Now it only saves custom events from backends (tile, map, attributes, etc..) and calculates the response time. Besides, removed tags to know whether overviews are being used.

lib/api/map/preview-layergroup-controller.js

@@ -100,7 +100,6 @@ function getPreviewImageByCenter (previewBackend) {
         const options = { mapConfigProvider, format, width, height, zoom, center };
 
         previewBackend.getImage(options, (err, image, stats = {}) => {
-            req.profiler.done(`render-${format}`);
             req.profiler.add(stats);
 
             if (err) {
@@ -133,7 +132,6 @@ function getPreviewImageByBoundingBox (previewBackend) {
         const options = { mapConfigProvider, format, width, height, bbox };
 
         previewBackend.getImage(options, (err, image, stats = {}) => {
-            req.profiler.done(`render-${format}`);
             req.profiler.add(stats);
 
             if (err) {