200-700% CPU during post-body-across-LAN testcase without
the busy-loop patch, 3.6-4.7% CPU with the busy-loop patch


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1605214 13f79535-47bb-0310-9956-ffa450edef68