Question

I came to know that, if we dont give width and height attr. in image tag there will be a performance isssue.
I have a div element for which i’m setting width and height in percentages. Also the same div is having a background image of fixed size say 140px * 140px.
Here, will there be a perfromance issuse?.

markup example:

<div style="width:50%;background:url('imgofsize140*140') no-repeat">&nbsp;</div>

Thanks

Answer 1

I wouldn’t think there would be a performance issue in the same way as not specifying height and width on a img tag, since that forces the browser to repaint the whole page and that’s where the performance issue is.

http://code.google.com/speed/page-speed/docs/rendering.html#SpecifyImageDimensions