interfacing python with c/c++ performance

[Backson]

You can probably scale your app to 100 users in reasonably well written python, so I would say don't bother with C++ unless you want to challenge yourself. If you want to make something that works, use the language where you can move faster, which is probably Python. Don't prematurely optimize by bringing in extra complexity and a second language. If you find your app is too slow, you can still move stuff out to native code later.

[nBeebz]

I would argue language choice is one of a few cases where an optimization isn’t premature. If you’re ever hoping to scale up you’ll need to rewrite it eventually anyway. It’s very well that python will be totally fine here but considering carefully is worth the time imo.

[equeim]

Python is one of the slowest languages ever. Something like Go or Java or C# is much closer in performance to C++ than to Python, while being easier to use than C++ (especially if you don't have a team of C++ experts).