This documentation is archived and is not being maintained.

Compiler Warning (level 1) C4124

__fastcall with stack checking is inefficient

The __fastcall keyword was used with stack checking enabled.

The __fastcall convention generates faster code, but stack checking causes slower code. When using __fastcall, turn off stack checking with the check_stack pragma or /Gs.

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