In that case, does HaskellR interfere with copy-on-modify in R, for example does it increment the reference count of R objects, then try to decrement them (whic

In that case, does HaskellR interfere with copy-on-modify in R, for example does it increment the reference count of R objects, then try to decrement them (which R doesn't or didn't really support), leaving those objects appearing to be multiply-referenced, and therefore forcing unnecessary copies as we see in plain R?