Still not feasible solution. Most of the templates contain embeded perl code. If I would compile them in every Apache process separatly, I will get size_of_compiled_code*number_of_httpd_processes memory consumption. On a large system (hundreds of httpd processes) even a small size of templates will require much memory, and I have quite a large templates.

In addition to this, they are user-customizable, so I accept that the size of whole bunch of templates will be considerable, too much to store in-memory.