[artsrc]

Sorry I was not clear enough.

I am not making any kind of sufficiently smart compiler claim (http://c2.com/cgi/wiki?SufficientlySmartCompiler).

You think I am saying that a compiler can do optimization better than a human.

What I assert is that the implementation language of a the tool that generates machine code guarantees nothing about either the source language, or the quality of the generated code. This was the assertion of the parent that invalid. He said that because the Java JIT compiler was written in C, that necessarily implies that the generated machine code would be slower that C.

Consider an Assembler, written in C, that generates machine code. By your logic you can't argue that assembly code is always less efficient than C.

Or alternatively Fortran compilers, written in C, which produce machine code that outperforms code generated from C for many tasks.