Bjarne Stroustrup: How C++ Combats Global Warming

Stroustrup talks about exciting trends in technology and about how the efficiency of C++ is helping save the environment.

• Category

  Science & Technology

[jacoblister]

His head has wings!

[Borislav Mitev]

And so is C++'s efficiency and speed.

[Keylogger27328]

Asm runs faster and uses a lot less space. C++ is good for high level programming though.

[Leaf682]

Optimizing is CHANGING, REMOVING, AND adding code, not just adding code. If you simply add more code without changing or removing anything logic will tell you that it reduces performance for that block because there is one more command there than before. Would you like me to explain how something else works, or do you understand basic logic now?

[micro5eb]

"If you add more code then it will reduce performance"

Bullshit. Create a simple program that does a task like generating prime numbers. Next, add optimisations. Is your code longer? If the answer is no then you aren't optimising, you are refactoring, or your algorithm was useless to begin with.

[ariscop]

Of the 4 of you, i wonder who was writing C++ and who was writing C with a C++ compiler.

[Jerry Ku]

Less server farms, less electricity used up, less global warming. Good. More money saved by the owner of the server farms, he then spends that money on a bigger house and bigger car. D'oh! Back to square one.

[nejtilsvampe]

As an electrical engineering student, C++ is extremely useful. Whenever you're dealing with software that is supposed to work with hardware, C++ is really good.

Basicly, every programming language is a tool. You use different tools for different tasks.

[Leaf682]

C++ wouldn't be called C++ if it there was nothing different, it would just be called C. C++ has more features (i.e. classes, etc.) therefore, using those features slows down the language. I'm not saying it's noticeable, but it's still there.

[bajan13k]

...but C is a subset of C++, so it's not really faster (i.e. the code it generates doesn't run any faster because of the language), you can use the same idioms.

You can do inline ASM in either if you're really that speed sensitive.

As for writing programs, how long it takes to write depends on the programmer more so than the language, if it is C vs. C++. Again, you can just use C++ as if it was "a better C".

[Leaf682]

Nonsense, basic logic will tell you that if you add more code, it will reduce performance. This may or may not be noticeable, but that's not the point. The point is, C is faster than C++ , even if it's only slightly faster, but for some applications (like calculations on super computers) the difference matters, and they'd use C instead.

[y35n00b5]

Languages change constantly, syntax rarely does.