Cycles: Add time report for Blender data synchronization

Allows to more easily access time information about how long Cycles
did spend synchronizing objects from evaluated depsgraph on Blender
side to its own structures.

This timer does not include time spent evaluating render depsgraph.

intern/cycles/blender/blender_sync.cpp

@@ -37,6 +37,7 @@
 #include "util/util_debug.h"
 #include "util/util_foreach.h"
 #include "util/util_hash.h"
+#include "util/util_logging.h"
 #include "util/util_opengl.h"
 #include "util/util_openimagedenoise.h"
 
@@ -219,6 +220,8 @@ void BlenderSync::sync_data(BL::RenderSettings &b_render,
                             int height,
                             void **python_thread_state)
 {
+  scoped_timer timer;
+
   BL::ViewLayer b_view_layer = b_depsgraph.view_layer_eval();
 
   sync_view_layer(b_v3d, b_view_layer);
@@ -242,6 +245,8 @@ void BlenderSync::sync_data(BL::RenderSettings &b_render,
   shader_map.post_sync(scene, false);
 
   free_data_after_sync(b_depsgraph);
+
+  VLOG(1) << "Total time spent synchronizing data: " << timer.get_time();
 }
 
 /* Integrator */