[R] determining system time for sequence of commands

[Jannis]

Dear list members,


I am trying to figure out how much CPU time individual commands inside 
one of my functions consume. Is it possible to obtain the CPU times of a 
whole sequence of commands inside a function? I know how to use 
system.time() but this would only give me the time consumed by the whole 
function. The only (cumbersome) way I figured out would be to run 
system.time for each individual command. Does anybody have a hint on a 
function/package that allows to do this automatically?


Thanks a lot
Jannis