Starting a tech startup with C++

Post by CyberDildonics » Sun, Jan 03, 2016, 12:58 AM UTC

srean wrote: post #28

petke wrote: post #16

> Manual memory management is the most popular misconception of C++. Since C++11, it is now recommended to use std::shared_ptr or std::unique_ptr for automatic memory management. There is a small computational cost to maintaining referenced pointers but it’s minuscule and the safety outweighs this cost. I think another misconception is that you need pointers at all. Smart pointers are still pointers. Its better to us…

You mean C++ programmers allocate n object on the heap even when its lifetime is the same as the scope of the containing block ? Unless its such a large huge object that stackoverflow is a possibility I cant imagine why would one do that.

Post by CyberDildonics » Sun, Jan 03, 2016, 1:02 AM UTC

petke wrote: post #31

pjc50 wrote: post #26

Earlier quoted context omitted.

Because copying the entire in-memory database you're using on every function call is kind of expensive?

Most often you can pass stack values to and from functions without copying. This is because of move constructors, and named return value optimization. Often its slower to use pointers (the indirection). For instance this does not do any expensive copies: std::string getStr() { auto huge_str = getDatabaseDump(); return huge_str; } void readStr(const std::string& str ){ //read str.. } int main() { auto str = getStr();…

Post by Rexxar » Sun, Jan 03, 2016, 1:12 AM UTC

samfisher83 wrote: post #71

samfisher83 wrote: post #20

I would find it hard to believe that c++ can be that much faster for many websites since the bottleneck would be the I/O subsystem. I don't understand how they are getting this 40x speed up. I wonder what the benchmark looks like.

I get down voted for posing a logical question?

Post by hifier » Sun, Jan 03, 2016, 1:33 AM UTC

thrownaway2424 wrote: post #78

avita1 wrote: post #75

Earlier quoted context omitted.

Not to dredge up this debate for the umpteenth time, but the same can be said of unit tests: they are not a proof of correctness, and they often give you a false sense of security.

The Internet has, indeed, conducted this argument thousands of times. My point here is only about the difficulty of reviewing Python code. I find myself sometimes having to hold up a piece of paper to the screen to see if the indentation has been done right, in addition to the aforementioned function-body-reading chores. Of course my opinion is of no concern to people except those who work with me, from whom I refuse…

Post by MattHarrington » Sun, Jan 03, 2016, 2:28 AM UTC

ilya1 wrote: post #7

Sounds very inspiring. Any other good places to start learning about C++ 11/14 for complete beginners with JS and other programming languages? I'm very much interested to create proof-of-concept for high performance SaaS services and play with C++ as it might be useful to build Node.js extension later.