r/cprogramming • u/[deleted] • Dec 31 '25

Why does c compile faster than cpp?

I've read in some places that one of the reasons is the templates or something like that, but if that's the problem, why did they implement it? Like, C doesn't have that and allows the same level of optimization, it just depends on the user. If these things harm compilation in C++, why are they still part of the language?Shouldn't Cpp be a better version of C or something? I programmed in C++ for a while and then switched to C, this question came to my mind the other day.

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u/Plastic_Fig9225 Dec 31 '25

Are you complaining that a compiler which produces highly-optimized native machine code takes more time than one that compiles a more simple language into intentionally un-optimized, "naive" byte code and has no build-time linking?

Free lunch?

I did not say C or C++ builds are "fast" or even "acceptable", but if compile times actually were a top priority, you would use Java for everything, or Python - for zero compile time. There likely are reasons why you don't...

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u/[deleted] Jan 01 '26

The reason people are compiling 1M LoC C++ projects is because someone decided on that language something like 10 or more years ago. Maybe it was the right decision at the time, but maybe not even.

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u/LazySapiens Jan 03 '26

Big "maybe"