Comment by petters
16 days ago
> C++ doesn't take longer to compile if you don't abuse templates.
Surprisingly, this is not true. I've written a C++ file only to realize at the end that I did not use any C++ features. Renaming the file to .c halved the compilation time.
I don't believe you, I measured compile times in c compilers and my own. If you provide more information I'd be more likely to believe you
On some compiler toolchains (IIRC MSVC was the main offender) you get a lot more code pulled into your source file when including a C stdlib header (like <stdio.h>) in C++ mode versus C mode. Basically a couple hundred lines in C mode versus thousands of lines in C++ mode.
That's fair. I'm unable to provide more information though so we'll have to disagree.
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I agree it shouldn't really matter if there's no C++ features in play, but I suppose third party headers could bite you if they use #ifdef __cplusplus to guard optional C++ extensions on top of their basic C interface. In that case the compiler could be dealing with dramatically more complex code when you build in C++ mode.
Maybe it is similar for the same compiler (but one should check, I suspect C could still be faster), but then there are much more C compilers. For example, TCC is a lot faster than GCC.
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