Debug mode.....

Many people have been saying that the debuging in mac os x is slowing it down.... while snooping around my computer (to set up annonomous ftp) i found a file in the folder /System/Library/Frameworks/System.framework/Versions/B/System called "System_debug." I was wondering if this file has anything to do with turing off debugging. If anyone finds a way to turn it off, please let me know!!! I would love to have a faster mac os x!