Go compiler is extremely slow on very large models

I have very large ThingML models (about 20kLoC) and the go compilers takes a very long time to compile them (about 75s) compared to Java and JS (and I guess POSIX). I suspect the quest for passing the  `testNaming` and `testNaming2` tests is costing me quite a lot of time.....

Not big issue per se, just quite annoying in the rare cases where we deal with big ThingML models...