MadCat221:
Logging is always on, but usually doesn't record much data. The logging of data useful for tuning Stutter Remover settings is done by changing the settings in the ini file named bEnableProfiling from 0 to 1. There are 2 such settings (that are meaningful anyway) in the current FNV stutter remover, they are CriticalSections / bEnableProfiling and Hashtables / bEnableProfiling. These are in the NVSR ini file (sr_New_Vegas_Stutter_Remover.ini) in Data/NVSE/Plugins. Sometimes referred to as CS profiling and HT profiling. CS profiling appears to be buggy on NVSR, WIPs 4b, 4c, and 5b have all been attempts to fix that. The logged data is recorded to sr_New_Vegas_Stutter_Remover.log in the main game directory. That contains data only the most recent game session, older data is overwritten.