C674 DSP coff /ELF format size and performance benchmark

Hi all,

 Any one know what is the detail difference between build a program to COFF or newer ELF format, given same/similar build/optimized option.

we concern three major aspects:

1) code size

2) MIPS

3) debug capability

now we are facing if still use the COFF or moving to newer ELF format， and want to know the major benefits to move to ELF format.

 thanks

Ivan