diff --git a/src/coco.c b/src/coco.c
index ce698e65..52787d6d 100644
--- a/src/coco.c
+++ b/src/coco.c
@@ -396,5 +396,5 @@ void run_coco(int argc, char **argv)
     else if(0==strcmp(argv[2], "valid")) validate_coco(cfg, weights);
     else if(0==strcmp(argv[2], "recall")) validate_coco_recall(cfg, weights);
     else if(0==strcmp(argv[2], "demo")) demo(cfg, weights, thresh, hier_thresh, cam_index, filename, coco_classes, 80, frame_skip,
-		prefix, out_filename, mjpeg_port, json_port, dont_show, ext_output, 0, 0, 0);
+		prefix, out_filename, mjpeg_port, json_port, dont_show, ext_output, 0, 0, 0, 0, 0);
 }
diff --git a/src/demo.c b/src/demo.c
index bb482c29..6f196cda 100644
--- a/src/demo.c
+++ b/src/demo.c
@@ -80,8 +80,6 @@ void *detect_in_thread(void *ptr)
     mean_arrays(predictions, NFRAMES, l.outputs, avg);
     l.output = avg;
 
-    free_image(det_s);
-
     cv_images[demo_index] = det_img;
     det_img = cv_images[(demo_index + NFRAMES / 2 + 1) % NFRAMES];
     demo_index = (demo_index + 1) % NFRAMES;
@@ -104,7 +102,8 @@ double get_wall_time()
 }
 
 void demo(char *cfgfile, char *weightfile, float thresh, float hier_thresh, int cam_index, const char *filename, char **names, int classes,
-    int frame_skip, char *prefix, char *out_filename, int mjpeg_port, int json_port, int dont_show, int ext_output, int letter_box_in, int time_limit_sec, char *http_post_host)
+    int frame_skip, char *prefix, char *out_filename, int mjpeg_port, int json_port, int dont_show, int ext_output, int letter_box_in, int time_limit_sec, char *http_post_host,
+    int benchmark, int benchmark_layers)
 {
     letter_box = letter_box_in;
     in_img = det_img = show_img = NULL;
@@ -122,6 +121,7 @@ void demo(char *cfgfile, char *weightfile, float thresh, float hier_thresh, int
     if(weightfile){
         load_weights(&net, weightfile);
     }
+    net.benchmark_layers = benchmark_layers;
     fuse_conv_batchnorm(net);
     calculate_binary_weights(net);
     srand(2222222);
@@ -202,7 +202,10 @@ void demo(char *cfgfile, char *weightfile, float thresh, float hier_thresh, int
 
     int send_http_post_once = 0;
     const double start_time_lim = get_time_point();
-    double before = get_wall_time();
+    double before = get_time_point();
+    double start_time = get_time_point();
+    float avg_fps = 0;
+    int frame_counter = 0;
 
     while(1){
         ++count;
@@ -211,7 +214,7 @@ void demo(char *cfgfile, char *weightfile, float thresh, float hier_thresh, int
             int local_nboxes = nboxes;
             detection *local_dets = dets;
 
-            if(pthread_create(&fetch_thread, 0, fetch_in_thread, 0)) error("Thread creation failed");
+            if (!benchmark) if (pthread_create(&fetch_thread, 0, fetch_in_thread, 0)) error("Thread creation failed");
             if(pthread_create(&detect_thread, 0, detect_in_thread, 0)) error("Thread creation failed");
 
             //if (nms) do_nms_obj(local_dets, local_nboxes, l.classes, nms);    // bad results
@@ -242,10 +245,10 @@ void demo(char *cfgfile, char *weightfile, float thresh, float hier_thresh, int
                 }
             }
 
-            draw_detections_cv_v3(show_img, local_dets, local_nboxes, demo_thresh, demo_names, demo_alphabet, demo_classes, demo_ext_output);
+            if (!benchmark) draw_detections_cv_v3(show_img, local_dets, local_nboxes, demo_thresh, demo_names, demo_alphabet, demo_classes, demo_ext_output);
             free_detections(local_dets, local_nboxes);
 
-            printf("\nFPS:%.1f\n", fps);
+            printf("\nFPS:%.1f \t AVG_FPS:%.1f\n", fps, avg_fps);
 
             if(!prefix){
                 if (!dont_show) {
@@ -282,9 +285,11 @@ void demo(char *cfgfile, char *weightfile, float thresh, float hier_thresh, int
                 printf("\n cvWriteFrame \n");
             }
 
-
-            pthread_join(fetch_thread, 0);
             pthread_join(detect_thread, 0);
+            if (!benchmark) {
+                pthread_join(fetch_thread, 0);
+                free_image(det_s);
+            }
 
             if (time_limit_sec > 0 && (get_time_point() - start_time_lim)/1000000 > time_limit_sec) {
                 printf(" start_time_lim = %f, get_time_point() = %f, time spent = %f \n", start_time_lim, get_time_point(), get_time_point() - start_time_lim);
@@ -294,7 +299,7 @@ void demo(char *cfgfile, char *weightfile, float thresh, float hier_thresh, int
             if (flag_exit == 1) break;
 
             if(delay == 0){
-                release_mat(&show_img);
+                if(!benchmark) release_mat(&show_img);
                 show_img = det_img;
             }
             det_img = in_img;
@@ -308,8 +313,17 @@ void demo(char *cfgfile, char *weightfile, float thresh, float hier_thresh, int
             //float curr = 1./(after - before);
             double after = get_time_point();    // more accurate time measurements
             float curr = 1000000. / (after - before);
-            fps = curr;
+            fps = fps*0.9 + curr*0.1;
             before = after;
+
+            float spent_time = (get_time_point() - start_time) / 1000000;
+            frame_counter++;
+            if (spent_time >= 3.0f) {
+                //printf(" spent_time = %f \n", spent_time);
+                avg_fps = frame_counter / spent_time;
+                frame_counter = 0;
+                start_time = get_time_point();
+            }
         }
     }
     printf("input video stream closed. \n");
@@ -345,7 +359,8 @@ void demo(char *cfgfile, char *weightfile, float thresh, float hier_thresh, int
 }
 #else
 void demo(char *cfgfile, char *weightfile, float thresh, float hier_thresh, int cam_index, const char *filename, char **names, int classes,
-    int frame_skip, char *prefix, char *out_filename, int mjpeg_port, int json_port, int dont_show, int ext_output, int letter_box_in, int time_limit_sec, char *http_post_host)
+    int frame_skip, char *prefix, char *out_filename, int mjpeg_port, int json_port, int dont_show, int ext_output, int letter_box_in, int time_limit_sec, char *http_post_host,
+    int benchmark, int benchmark_layers)
 {
     fprintf(stderr, "Demo needs OpenCV for webcam images.\n");
 }
diff --git a/src/demo.h b/src/demo.h
index c49a9017..12781930 100644
--- a/src/demo.h
+++ b/src/demo.h
@@ -6,7 +6,7 @@
 extern "C" {
 #endif
 void demo(char *cfgfile, char *weightfile, float thresh, float hier_thresh, int cam_index, const char *filename, char **names, int classes,
-    int frame_skip, char *prefix, char *out_filename, int mjpeg_port, int json_port, int dont_show, int ext_output, int letter_box_in, int time_limit_sec, char *http_post_host);
+    int frame_skip, char *prefix, char *out_filename, int mjpeg_port, int json_port, int dont_show, int ext_output, int letter_box_in, int time_limit_sec, char *http_post_host, int benchmark, int benchmark_layers);
 #ifdef __cplusplus
 }
 #endif
diff --git a/src/detector.c b/src/detector.c
index 449b5756..bb059c77 100644
--- a/src/detector.c
+++ b/src/detector.c
@@ -1589,7 +1589,10 @@ void test_detector(char *datacfg, char *cfgfile, char *weightfile, char *filenam
 void run_detector(int argc, char **argv)
 {
     int dont_show = find_arg(argc, argv, "-dont_show");
+    int benchmark = find_arg(argc, argv, "-benchmark");
     int benchmark_layers = find_arg(argc, argv, "-benchmark_layers");
+    if (benchmark_layers) benchmark = 1;
+    if (benchmark) dont_show = 1;
     int show = find_arg(argc, argv, "-show");
     int letter_box = find_arg(argc, argv, "-letter_box");
     int calc_map = find_arg(argc, argv, "-map");
@@ -1667,7 +1670,7 @@ void run_detector(int argc, char **argv)
             if (strlen(filename) > 0)
                 if (filename[strlen(filename) - 1] == 0x0d) filename[strlen(filename) - 1] = 0;
         demo(cfg, weights, thresh, hier_thresh, cam_index, filename, names, classes, frame_skip, prefix, out_filename,
-            mjpeg_port, json_port, dont_show, ext_output, letter_box, time_limit_sec, http_post_host);
+            mjpeg_port, json_port, dont_show, ext_output, letter_box, time_limit_sec, http_post_host, benchmark, benchmark_layers);
 
         free_list_contents_kvp(options);
         free_list(options);
diff --git a/src/yolo.c b/src/yolo.c
index 5f918e50..c370eb0a 100644
--- a/src/yolo.c
+++ b/src/yolo.c
@@ -359,5 +359,5 @@ void run_yolo(int argc, char **argv)
     else if(0==strcmp(argv[2], "valid")) validate_yolo(cfg, weights);
     else if(0==strcmp(argv[2], "recall")) validate_yolo_recall(cfg, weights);
     else if(0==strcmp(argv[2], "demo")) demo(cfg, weights, thresh, hier_thresh, cam_index, filename, voc_names, 20, frame_skip,
-		prefix, out_filename, mjpeg_port, json_port, dont_show, ext_output, 0, 0, 0);
+		prefix, out_filename, mjpeg_port, json_port, dont_show, ext_output, 0, 0, 0, 0, 0);
 }