Compiler Warning (level 1) C4124

__fastcall with stack checking is inefficient

The __fastcall keyword was used when stack checking was enabled.

The __fastcall calling convention is used for generating faster code, but stack checking causes slower code to be generated. Use the /Gs option or the check_stack pragma to turn off stack checking when using __fastcall.

This warning is informational and is issued only for the first function declared under these conditions.