From this example and from the link of the first response above, I guess all I need is to insert the

close STDOUT;

in the child process after I print the html page but it does not seem to do the trick. Your example does not work either. The page is still hanging 30 seconds before it gets redirected to page1.html for some reason. I have the example at

http://129.107.52.101/cgi-bin/testpull.cgi