The more extra cells and tables, the less efficient your code will be. Try to use the minimum number of cells in your tables. Again, Don t use unnecessary attributes. Another common practice is to use spacer GIFs to get the accurate spacing required in the table. A spacer GIF is a small image file that you can specify the width and height to.
Images are very download costly .
Cells should always have something in them to hold them in their position, but try to use spaces instead of GIFs. Tables can become very messy, and many coders will try to space out the code so that it is easier to read. Remember, even tabs, spaces and hard returns require file size. Try to keep the code clean, yet keep it trimmed. Keeping your graphics lean.