Question

Point out the correct statement?

(a) “by.total” first subtracts out time spent in functions above the current function in the call stack

(b) The summaryRprof() function calculates how much time is spend in which function

(c) By default, the profiler samples the function call stack every 0.02 seconds

(d) The Rprofiler() function starts the profiler in R

This question was posed to me during an interview.

This key question is from R Profiler topic in section Profiling, Simulation and Data Analysis of R Programming

Answer 1

The correct option is (c) By default, the profiler samples the function call stack every 0.02 seconds

For explanation I would say: Output of by.self is more useful than by.total for interpreting the data.