Slow performance in loading main page

[hk_traveller]

I just installed 4images and found that it is very slow.  However it seems that it is not relate to the system performance as the same machine running phpbb very fast.  You may test the performance in the following URL

http://photo.tonyleung.com/4images/ (very slow)

http://photo.tonyleung.com/phpbb/ (ok)

Anyone has similar experience and get resolved?

Thanks!

[hk_traveller]

I traced the logic flow and it seems that the problem occur in page_footer.php

Some php pages loads very fast while some are very slow. The index.php and categories.php has to execute page_footer.php:
http://photo.tonyleung.com/4images/categories.php?cat_id=3

And some pages without footer loads very fast:
http://photo.tonyleung.com/4images/admin/index.php

Anyone has ideas what's going?