STD and Performance

When ever I use the STD namespace, my programs become dramatically slower. In other words, C++ things such as string, new, delete, and cout all cause code to run super slow. I get around this by using char*, malloc, free, and printf. Is there any technique, at all, that would allow me to use string, new, delete, and cout without the performance hit?

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Originally Posted by thetinman

When ever I use the STD namespace, my programs become dramatically slower. In other words, C++ things such as string, new, delete, and cout all cause code to run super slow. I get around this by using char*, malloc, free, and printf.

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Is your C code really doing what your C++ code does? For example, a simple use of std::cin with operator>> to read into a std::string object can be more complicated in C than it might initially appear.

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Originally Posted by thetinman

Is there any technique, at all, that would allow me to use string, new, delete, and cout without the performance hit?

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You should specify your compiler (and hence the standard library implementation) and the compile options that you used. For example, are you compiling at a high optimisation level with NDEBUG defined? If your standard library implementation supports checked iterators, has that feature been disabled?

It's very easy to use the STL containers in a poor way causing lots of allocations and deallocations and copying.
If you show us the code we might be able to show you better ways.