Memory Leak - No libraries involved

[eluser]Medikal[/eluser]
I seem to have found a memory leak in one of my pages on my website, it takes 20+ seconds to load each time, and it plays a large part of my websites purpose, so figuring it out is vital.

Classic error message I get:
Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 22373429 bytes) in Directories..../libraries/Output.php on line 92

Now this controller to display the page uses the same function as many of the other pages, so I have no idea how to pinpoint it, any thoughts?