Performance: filter model vs lookup table

[bmorris3]

It looks like tynt will be capable of returning filter transmittance curves as either astropy composite models or as lookup tables. It'll be interesting to do a little profiling to measure how the performance of the two different methods compare with synphot computations.

[pllim]

Two kinds of performance profiling are possible: Speed and memory.

A good reference: https://jakevdp.github.io/PythonDataScienceHandbook/01.07-timing-and-profiling.html