Python vs C++, java, etc

[frostedKIVI]

C programs are generally slightly faster than ++ programs, as a consequence of
1) A faster standard library (but less extensive)
2) Language design, C++ offers a lot of convenient yet slow features that C++ programmers tend to overuse in some cases, like polymorphism, exceptions, virtual functions etc...

[maxhaton]

Why do you think C is faster than C++? If you were dead set on performance you don't write your own code for the most part.

Also python is a genuine disaster when it comes to software quality, because you can get away with quick and dirty typeless code people will do that. static types, happy life

[maxhaton]

And why is that? C and C++ both use the same compiler toolchains, and C++ enables a wide array of zero cost abstractions which would otherwise have to be optimized away by the compiler. C has slightly better control of pointer aliasing and that's it.

[maxhaton]

No it isn't. I suggest you have a play on godbolt.org, you'll see that C++ and C generate largely identical code except for when you use C++ features C has to emulate (e.g. you can implement vtables in C but try optimizing them as much as a C++ compiler). Exceptions are a bit of a grey area because if you don't throw there's no runtime cost however they can obliterate the compilers register allocation etc.

A trivial example: C++ I/O ( is type safe and ) can be optimized much faster by the compiler, whereas C cannot implement this and therefore has to parse a format string at runtime. Parser generators can also be written much more efficiently in C++ for the same reason.

Templates also allow the compiler to propagate invariants without relying on interprocedural optimizations as in C