Class referencing appears a memory leak

[eluser]Pygon[/eluser]
As I said -- it sounds to me like your script, not CI framework, is the cause. The framework itself uses less (PHP max) than 8M. I think you need to take a closer look and debug your script.

I'm not exactly sure what you mean by the "several times nested config/language/loader". CI doesn't do this (other than in function which are immediately destroyed), so again, you should look at how you're programming things.