Optimizating my code simulating a database

Question

I have been working on a program, simulating a small database where I could make queries, and after writing the code, I have executed it, but the performance is quite bad. I

Answer 1

One obvious issue is that your get-functions return vectors by value. Do you need to have a fresh copy each time? Probably not.

If you try to return a const reference instead, you can avoid a lot of copies:

const vector

& getPointer();

and similar for the nested get's.

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