Why do most people comment out pbds code in their template

I comment pbds because of compilation time. If you include more headers in your code then the compilation time will be increased so you can save a bit of time when working with algorithms because most of the time it's just not needed.

Personally, I've never fixed the PBDS issues on MinGW. Due to laziness, I probably never will, so sometimes I just comment it out so it will compile when I don't need to use it, and I uncomment it whenever I need to submit it.

I don't use it at all because I've seen it being the reason for solutions not passing due to it being somewhat slow.

I think it's just because some people don't like to include something they don't use in their code.

No including PBDS in your code does not slows execution time but it will increase compilation time. Ordered Set is not included in C++ STL because it is not a part of C++ STL , it's a part of GNU based Policy based data structures and is present in GCC only.

The reasons I can think of why most people comment PBDS code in their template are

• It increases compilation time.
• On some versions of MinGW the name of file is very weird something like hash_standard_resize_policy_imp.hpp0000644 and on including #include<ext/pb_ds/assoc_container.hpp> in their code throws the error Error was "cannot open source file hash_standard_resize_policy_imp.hpp ". so they don't bother with it and simply comment it out.