$2\mathrm{.}20$ Bob has a program that he wants to time with two sets of data, input$\_$data$1$ and input$\_$data$2.$ To get some idea of what to expect before adding timing functions to the code he's interested in$,$ he runs the program with two sets of data and the Unix shell command time:

s time $./$bobs$\_$prog $$ input$\_$data$1$

real $0$m$0\mathrm{.}001$s

user $0$m$0\mathrm{.}001$s

sys $0$m$0\mathrm{.}000$s

s time $.$lbobs$\_$prog $$ input$\_$data$2$

real $1$ml$\mathrm{.}234$s

user $1$m$0\mathrm{.}001$s

sys $0$m$0\mathrm{.}111$s

The timer function Bob is going to use in his program has millisecond resolution. Should Bob use it to time his program with the first set of data? What about the second set of data? Why or why not?