I looked at performance tuning options in XenForo Admincp and found that it would help a lot if I've an opcode caching mechanism on my server. I contacted my server admins and they said I've IonCube and Zend Optimizer installed on my server. After reading couple of threads on webmaster forums, it seems that eAccelerator is the ideal Opcode caching mechanism to have on server. Would you recommend that I ask my admins to install eAccelerator on my server in addition to the ioncube and zend optimizer? Or, do I have other alternatives?