mod_perl , ChildInitHandler, OpenApi

Hi, 

we're running our application build with mod_perl and MasonX::WebApp::ApacheHandler  (quite old, yes I know)
Now I would like to use OpenAPI::Client to connect to some other web services we need. OpenAPI::Client generates code based on the api specification, but this takes 3 -4 seconds , which is far too slow to call it on every request. 
How can I initialize the OpenAPI::Client during server startup and use the compiled code later ( i.e. access the object created)?  I'm thinking about doing this in  a ChildInitHandler, but I have no idea, where to "store" the result. We're using mom_event in production, anything to consider with this ? 

Thanks
Rolf