[klmr]

As far as I know byte-compiling won’t actually alleviate the repeated name lookup (or does it?). Unless the R byte compiler is fiendishly clever, every single name lookup in the loop body will still incur what essentially amounts to a `get(name, environment(), inherits = TRUE)` call.

[gbrown]

Probably not, but I'll admit to not having dug into it too deeply. In my initial experiments, I found only modest speed gains when byte compiling. Then again, I'm already using C functions wherever possible.