Using '\n' in your program can have a positive impact on performance compared to using endl. This is because '\n' only inserts a newline character without flushing the output buffer, which can lead to faster execution times. On the other hand, endl not only inserts a newline character but also flushes the output buffer, causing additional overhead, especially when outputting a large amount of data frequently. Therefore, the use of std::flush can indeed result in longer execution times, ultimately...
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It is logical for MinGW to adopt the same name-mangling scheme as other Windows compilers in order to enhance compatibility with C++ libraries. Although there have been discussions and mentions of "ms-mangling," it is important to note that it is not currently a standard feature of MinGW. Despite user interest, the implementation of this feature is still pending.