Optimisation: experiment with moving render functions into headers

[Jack Armitage]

you could try moving the definitions of the Resonator::render() and ResonatorBank::render() functions to Resonators.h (possibly inside the class declaration itself), and see if the compiler can achieve performance improvement by optimizing away some function calls.

• https://forum.bela.io/d/895-max-pd-resonators-resonant-filter-bank-ported-to-bela-c/5