Add autoShape() speed profiling (#2459)

* Add autoShape() speed profiling

* Update common.py

* Create README.md

* Update hubconf.py

* cleanuip

README.md

@@ -108,11 +108,11 @@ To run **batched inference** with YOLOv5 and [PyTorch Hub](https://github.com/ul
 import torch
 
 # Model
-model = torch.hub.load('ultralytics/yolov5', 'yolov5s', pretrained=True)
+model = torch.hub.load('ultralytics/yolov5', 'yolov5s')
 
 # Images
 dir = 'https://github.com/ultralytics/yolov5/raw/master/data/images/'
-imgs = [dir + f for f in ('zidane.jpg', 'bus.jpg')]  # batched list of images
+imgs = [dir + f for f in ('zidane.jpg', 'bus.jpg')]  # batch of images
 
 # Inference
 results = model(imgs)