https://community.intel.com/t5/Intel-Fortran-Compiler/Stack-vs-Save-attribute-and-performance/m-p/771392#M22731 <DIV>If a subroutine or functions is called repeatedly, such as the MainWindowProc() in a win32 program, is it better to use the SAVE attribute for all variables in that function or subroutine rather than using the stack?</DIV><DIV></DIV><DIV>I am curious about how this affects program performance or efficiency.</DIV> Sun, 19 Mar 2006 21:56:30 GMT ahasan 2006-03-19T21:56:30Z https://community.intel.com/t5/Intel-Fortran-Compiler/Stack-vs-Save-attribute-and-performance/m-p/771392#M22731 <DIV>If a subroutine or functions is called repeatedly, such as the MainWindowProc() in a win32 program, is it better to use the SAVE attribute for all variables in that function or subroutine rather than using the stack?</DIV><DIV></DIV><DIV>I am curious about how this affects program performance or efficiency.</DIV> Sun, 19 Mar 2006 21:56:30 GMT https://community.intel.com/t5/Intel-Fortran-Compiler/Stack-vs-Save-attribute-and-performance/m-p/771392#M22731 ahasan 2006-03-19T21:56:30Z https://community.intel.com/t5/Intel-Fortran-Compiler/Stack-vs-Save-attribute-and-performance/m-p/771393#M22732 Using SAVE will defeat some optimizations. Such routines don't tend to have large local variables, so the performance difference relative to the allocation type is probably not measurable. Stack is friendlier to cache than static. Mon, 20 Mar 2006 01:50:26 GMT https://community.intel.com/t5/Intel-Fortran-Compiler/Stack-vs-Save-attribute-and-performance/m-p/771393#M22732 Steven_L_Intel1 2006-03-20T01:50:26Z https://community.intel.com/t5/Intel-Fortran-Compiler/Stack-vs-Save-attribute-and-performance/m-p/771394#M22733 <DIV></DIV>Thanks Steve. I appreciate the reply and info. Mon, 20 Mar 2006 07:00:31 GMT https://community.intel.com/t5/Intel-Fortran-Compiler/Stack-vs-Save-attribute-and-performance/m-p/771394#M22733 ahasan 2006-03-20T07:00:31Z