Homework 0: system calls and routine calls

System calls look exactly like routine calls in C/C++. Assuming both are 
doing the same thing, which one has better performance? Run getid.c and 
measure the times for 10000000 invocations of the getid routine and 10000000
invocations of the getpid system call (returning the process id) on 
linprog.cs.fsu.edu and program.cs.fsu.edu. Report the timing results and answer
the question "Which has better performance: systems calls or routine calls?" 
based on your timing results. Also give an explanation (1-2 sentences) why 
this is happening.