Does this make any sense ? Does it harm performance ?

Can be applied to countless classes in bosh.
[NOOP] - ActorLevels: mod_id_levels --> mod_fid_levels in local variables
[NOOP] - ActorLevels: id_levels --> fid_levels in local variables
[NOOP] - ActorLevels: id --> fid in local variables
[NOOP] - ActorLevels: obId_levels --> obfid_levels in local variables
[NOOP] - ActorLevels: Change in loop logic so classes map more closely
ActorLevels - Renaming field mod_id_levels to mod_fid_levels:

Should be NOOP (search indicates only used inside the class) - so should be
named _mod_fid_levels ~!