What do you think about Borland Delphi and C++Builder . How about different versions? Did Borland (Inprise) better in new versions. In this short article I show you results of my tests on these compilers. Tests are done on a Celeron 500 with 128MB RAM on a PC100 motherboard. Test program contains VCL Objects, Thread, Loop and other tests. I do not promise that these tests are 100% correct but they are good to have a general seen of their quality and changes from one version to another. I have written Delphi and C++ Builder codes so that they are as near as possible (line by line) to each other. Win2000 Pro. Win NT4Srv. Win 98 Sec. Code C++ Builder 4 2008 2017 2198 409K C++ Builder 5 1092 1100 1156 426K Delphi 4 849 989 1072 343K Delphi 5 2016 2020 2193 355K * Higher numbers show better results (all compiled static. Delphi and C++ builder programs are only recompiled using higher Version ) Results show that Delphi 5 is very better than Delphi 4 but newer version of C++ builder is very slow. Everyone understands the need for a good C++ RAD environment but this one makes very slow programs. In other tests that I performed, C++Builder had bad results in many cases. I personally do not use it for critical purposes and big applications. C Builder console programs were about 10-50 times slower than DOS version (I compiled exact program with BC31 and C++Builder 4). Also I saw a lot of bugs and errors in C++Builder 4 (I have not worked much with C++Builder 5 when I write this). Delphi is very better in these cases . So however I am a C programmer (Unix, Linux, VC++ ) I prefer Delphi for my RAD works .I will publish test results on other compilers soon. To see complete article on web go to: http://www.angelfire.com/nt/sarmadys/test1.html