Add API to get frame setup time on CPU

Needed for benchmarks

servers/rendering/rendering_server_default.cpp

@@ -101,11 +101,16 @@ void RenderingServerDefault::draw(bool p_swap_buffers, double frame_step) {
 
 	TIMESTAMP_BEGIN()
 
+	uint64_t time_usec = OS::get_singleton()->get_ticks_usec();
+
 	RSG::scene->update(); //update scenes stuff before updating instances
 
+	frame_setup_time = double(OS::get_singleton()->get_ticks_usec() - time_usec) / 1000.0;
+
 	RSG::storage->update_particles(); //need to be done after instances are updated (colliders and particle transforms), and colliders are rendered
 
 	RSG::scene->render_probes();
+
 	RSG::viewport->draw_viewports();
 	RSG::canvas_render->update();
 
@@ -159,6 +164,10 @@ void RenderingServerDefault::draw(bool p_swap_buffers, double frame_step) {
 	frame_profile_frame = RSG::storage->get_captured_timestamps_frame();
 }
 
+float RenderingServerDefault::get_frame_setup_time_cpu() const {
+	return frame_setup_time;
+}
+
 void RenderingServerDefault::sync() {
 }
 

servers/rendering/rendering_server_default.h

@@ -72,6 +72,8 @@ class RenderingServerDefault : public RenderingServer {
 	uint64_t frame_profile_frame;
 	Vector<FrameProfileArea> frame_profile;
 
+	float frame_setup_time = 0;
+
 public:
 	//if editor is redrawing when it shouldn't, enable this and put a breakpoint in _changes_changed()
 	//#define DEBUG_CHANGES
@@ -845,6 +847,8 @@ public:
 
 	/* TESTING */
 
+	virtual float get_frame_setup_time_cpu() const;
+
 	virtual void set_boot_image(const Ref<Image> &p_image, const Color &p_color, bool p_scale, bool p_use_filter = true);
 	virtual void set_default_clear_color(const Color &p_color);
 

servers/rendering/rendering_server_wrap_mt.h

@@ -776,6 +776,10 @@ public:
 		return rendering_server->get_frame_profile();
 	}
 
+	virtual float get_frame_setup_time_cpu() const {
+		return rendering_server->get_frame_setup_time_cpu();
+	}
+
 	virtual void sdfgi_set_debug_probe_select(const Vector3 &p_position, const Vector3 &p_dir) {
 		rendering_server->sdfgi_set_debug_probe_select(p_position, p_dir);
 	}

servers/rendering_server.cpp

@@ -1817,6 +1817,9 @@ void RenderingServer::_bind_methods() {
 
 	ClassDB::bind_method(D_METHOD("is_render_loop_enabled"), &RenderingServer::is_render_loop_enabled);
 	ClassDB::bind_method(D_METHOD("set_render_loop_enabled", "enabled"), &RenderingServer::set_render_loop_enabled);
+
+	ClassDB::bind_method(D_METHOD("get_frame_setup_time_cpu"), &RenderingServer::get_frame_setup_time_cpu);
+
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "render_loop_enabled"), "set_render_loop_enabled", "is_render_loop_enabled");
 
 	BIND_CONSTANT(NO_INDEX_ARRAY);

servers/rendering_server.h

@@ -1409,6 +1409,8 @@ public:
 	virtual Vector<FrameProfileArea> get_frame_profile() = 0;
 	virtual uint64_t get_frame_profile_frame() = 0;
 
+	virtual float get_frame_setup_time_cpu() const = 0;
+
 	/* TESTING */
 
 	virtual RID get_test_cube() = 0;