Couple of comments...
What on Earth takes 3 seconds to load for one line? Explain the data involved and why the long load time (explain technically, is database involved?)
Why do I ask? Sometimes a re-thinking of the logic as to how data is organized and displayed should be re-evaluated, we might be able to offer suggestions to help you reduce load times and make it easier for the end user to browse the data. Sometimes it's as simple as pagination. Follow?
If your answer above includes graphics or links - tables are intended for tabular data, not any other type of content - should you be using tables at all?
Now for some generic advice, without knowing what exactly you are doing:
1) Introduce a caching mechanism
2) Optimize any database queries involved
3) If images are involved, are they optimized as well, and nothing crazy like loading thumbnails simply by resizing via the HTML?
4) Consider the use of Ajax to dynamically load paginated content (keeping track of the offset, so content is loaded one page at a time, not all at once, plus it's cool looking)
5) Your server is rediculously slow (low on resources, shared, free webhost, etc.)
So consider this a way to get the conversation started. But need more input and info from you, no doubt.