Does <img src=""> hurt performance?

Question

I just wanted to know if <img src=""> hurts performance in asp.net? If yes, then how, and what is a better solution?

EDIT

I would like to add some more details:-If developer miss the src tag or if the image is missing from the server(for example a.jpg is missing from the server)

<img src="Images/a.jpg">

EDIT

I asked this question because recently I faced a problem in which our Page do double postaback just because of fav.ico was missing from the server.

Answer 1

Yes, as you need another request to get the image. ;-)

IE6 won't respect content expiration headers when <img> is inside iframe.

It may be better to use a background image (CSS) with a sprite.