While it is for Windows and not DOS, some time ago i wrote a small raytracing benchmark for C and Pascal (coded pretty much the same between the two languages)

While it is for Windows and not DOS, some time ago i wrote a small raytracing benchmark for C and Pascal (coded pretty much the same between the two languages) and the Borland compilers for C++ and Delphi (Object Pascal) had pretty much the same results: http://runtimeterror.com/tools/raybench/ http://runtimeterror.com/tools/raybench/ What was probably the case is that there were more C compilers so some of them produced better code than Borland's.