+ new prims
+ increased stack sizes for the tests

very small speedup, not sure if it is worthwhile to do

- CT_LIT -> SHARED_THUNK
- CT_VAR only local vars, function names are converted to applications
- CT_APP dynamic/static. static case contains the correct descriptor pointer (to the slice)

+ faster way to check if thunk can be overwritten
+ check in the last two cases if arg is strict before evaluation

+ "eval" where cannot be avoided