One thing I hear over and over about SpinCAD is that the code is inefficient.
My snarky response is: "go ahead and write everything in Spin ASM then".
My helpful response is: "read this, you'll learn how to hand optimize SpinCAD generated ASM and probably still come out ahead"
https://github.com/HolyCityAudio/SpinCAD-Designer/blob/master/docs/optimizing-spin-asm-code-generation.pdf