ios - Circular UIImageView in UITableView without performance hit? -

i have uiimageview on each of uitableview cells, display remote image (using sdwebimage). i've done quartzcore layer styling image view, such:

uiimageview *itemimageview = (uiimageview *)[cell viewwithtag:100];     itemimageview.layer.borderwidth = 1.0f;     itemimageview.layer.bordercolor = [uicolor concretecolor].cgcolor;     itemimageview.layer.maskstobounds = no;     itemimageview.clipstobounds = yes; 

so have 50x50 square faint grey border, i'd make circular instead of squared. app hemoglobe uses circular images in table views, , that's effect i'd achieve. however, don't want use cornerradius, degrades scrolling fps.

here's hemoglobe showing circular uiimageviews:

is there way effect? thanks.

simply set cornerradius half of width or height (assuming object's view square).

for example, if object's view's width , height both 50:

itemimageview.layer.cornerradius = 25; 

update - user atulkhatri points out, won't work if don't add:

itemimageview.layer.maskstobounds = yes;