drvai seriously, what is wrong with you??
You have asked five times now the exact same question in this thread. You also PMed me the same question and I answered it ages ago.
There is no noticeable impact on performance when AC is on or off.
BMW E92 M3 6MT, G-Power SKII supercharged, custom exhaust with 100 cell cats and Remus Sport mufflers, Brembo 380mm BBK, BMW Performance steering wheel, LUX H8 angel eyes, CF CSL boot, Hamann CF diffuser, Vorsteiner CF lip, CF grilles, CF gills, CF bonnet vents, BMW Performance stripes, RAC RG63 wheels, Eibach lowering springs, camber modifications.