Every time I mention slow performance of C++ standard library iostreams, I get met with a wave of disbelief. Yet I have profiler results showing large amounts of time spent in iostream library code (full compiler optimizations), and switching from iostreams to OS-specific I/O APIs and custom buffer management does give an order of magnitude improvement.Every time I mention slow performance of C++ st
阅读背景：
是c++标准要求iostreams有很差的性能，还是我只是在处理一个糟糕的实现?
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