cpuTime()
i1 : t1 = cpuTime() o1 = 153.710169409 o1 : RR (of precision 53)
i2 : for i from 0 to 1000000 do 223131321321*324234324324;
i3 : t2 = cpuTime() o3 = 154.864525936 o3 : RR (of precision 53)
i4 : t2-t1 o4 = 1.154356526999976 o4 : RR (of precision 53)
The object cpuTime is a compiled function.