I would love to see how you did this as well. It would save my mods sooo much time if that was done automatically.

I've got a thread that has almost 47,000 replies now (like 100 or more posts per day in it so it's pretty busy).
It doesn't seem to slow my forums down any but viewing the thread does take a while.
It takes about 2 seconds to load while any other thread would take 0.4 seconds...

Of course!
This hack removes the flash between pages. That works when a page loads in about 1-2 seconds.

When it takes more then 10 seconds to load a page, this flash isn't going to help ANYthing.

I want to have my forums faster, not to seem faster. And.. Not all my users are using the same browser.

Ok.. I see. But how many users do you have online? And how many of these threads you have? And how many post per page?

"Currently Active Users: 667 (91 members and 576 guests)"
This is about the average.

There is only 1 thread that large, there are others around 4,000 posts.

We would have more but only in the last year started allowing over 1000 posts.:)

Check your slow_query log and see which threads show up most often in there.

Where can I find that log?

You need to enable slow_query logging in my.cnf. It would be on your server.

I don't have an item called 'slow_query'.