[Ipopt] IPOPT with AMPL VS IPOPT with native C++

[Nicolas Derhy]

Hi everybody,

I did not find information in the documentation regarding the IPOPT
performance.
I have a lot of small instances to solve and I would prefer to use AMPL
because I won't have to write new C++ code.

However I do not have any idea of the perfomance gap between these two
approaches. I do not know if AMPL calculates jacobian, hessian,... with
efficiency and how AMPL and IPOPT communicates (via file, memory ?).

Do you have any advice from you IPOPT experience ?

Best regards,

Nicolas
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