The procedure profile alters the given procedures to record runtime information on the procedures. If profile is successful, it returns NULL on exit.

The profiling information is printed using the showprofile() function as shown in the examples below.  For more options and examples see ?showprofile. To stop collecting profiling information on a function, use unprofile(). To reset the profiler to begin a new profile use resetprofile().

Use of profile() increases memory usage and slows down computations, sometimes dramatically.  In addition, profile may not work properly with procedures that have special evaluation rules.

A closely related function, exprofile(), can be used to profile all Maple functions at once.

fib:=proc(n) option remember; if n<2 then n else fib(n-1)+fib(n-2) end if; end proc:

function           depth    calls     time    time%         bytes   bytes%
---------------------------------------------------------------------------
fib                    5        9    0.000     0.00          6168   100.00
---------------------------------------------------------------------------
total:                 5        9    0.000     0.00          6168   100.00

function           depth    calls     time    time%         bytes   bytes%
---------------------------------------------------------------------------
gcd                    1        1    0.011    91.67        552280    84.89
randpoly               1        3    0.001     8.33         74504    11.45
expand                 1        8    0.000     0.00          6160     0.95
divide                 1        6    0.000     0.00         17656     2.71
---------------------------------------------------------------------------
total:                 4       18    0.012   100.00        650600   100.00

function           depth    calls     time    time%         bytes   bytes%
---------------------------------------------------------------------------
gcd                    1        1    0.005    71.43        253256    69.59
divide                 1        6    0.002    28.57        110656    30.41
content                0        0    0.000     0.00             0     0.00
---------------------------------------------------------------------------
total:                 2        7    0.007   100.00        363912   100.00