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:

$\mathrm{profile}\left(\mathrm{fib}\right)$

$\mathrm{fib}\left(5\right)$

$5$

$\mathrm{showprofile}\left(\mathrm{fib}\right)$

function           depth    calls     time    time%         bytes   bytes%
---------------------------------------------------------------------------
fib                    5        9    0.001   100.00          6512   100.00
---------------------------------------------------------------------------
total:                 5        9    0.001   100.00          6512   100.00

$\mathrm{unprofile}\left(\mathrm{fib}\right)$

$\mathrm{profile}\left(\gcd \&comma;\mathrm{divide}\&comma;\mathrm{expand}\&comma;\mathrm{randpoly}\right)$

$g≔\mathrm{randpoly}\left(\left[x\&comma;y\right]\&comma;\mathrm{degree}=2\&comma;\mathrm{dense}\right)$

$g≔-7x^2+22xy-94y^2-55x+87y-56$

$a≔\mathrm{expand}\left(g\mathrm{randpoly}\left(\left[x\&comma;y\right]\&comma;\mathrm{degree}=2\&comma;\mathrm{dense}\right)\right)\&colon;$

$b≔\mathrm{expand}\left(g\mathrm{randpoly}\left(\left[x\&comma;y\right]\&comma;\mathrm{degree}=2\&comma;\mathrm{dense}\right)\right)\&colon;$

$\gcd \left(a\&comma;b\right)$

$7x^2-22xy+94y^2+55x-87y+56$

$\mathrm{showprofile}\left(\right)$

function           depth    calls     time    time%         bytes   bytes%
---------------------------------------------------------------------------
gcd                    1        1    0.006    66.67        615144    86.36
randpoly               1        3    0.002    22.22         90592    12.72
divide                 1        6    0.001    11.11          3056     0.43
expand                 1        8    0.000     0.00          3488     0.49
---------------------------------------------------------------------------
total:                 4       18    0.009   100.00        712280   100.00

$\mathrm{resetprofile}\left(\right)$

$\mathrm{profile}\left(\gcd \&comma;\mathrm{divide}\&comma;\mathrm{content}\right)$

$g≔\mathrm{randpoly}\left(\left[x\&comma;y\right]\&comma;\mathrm{degree}=3\&comma;\mathrm{dense}\right)\&colon;$

$a≔\mathrm{expand}\left(g\mathrm{randpoly}\left(\left[x\&comma;y\right]\&comma;\mathrm{degree}=7\&comma;\mathrm{dense}\right)\right)\&colon;$

$b≔\mathrm{expand}\left(g\mathrm{randpoly}\left(\left[x\&comma;y\right]\&comma;\mathrm{degree}=7\&comma;\mathrm{dense}\right)\right)\&colon;$

$\gcd \left(a\&comma;b\right)$

$92x^3-6x^{2}y-72x{y}^2-87y^3-74x^2-37xy-44y^2+23x-29y-98$

$\mathrm{showprofile}\left(\right)$

function           depth    calls     time    time%         bytes   bytes%
---------------------------------------------------------------------------
gcd                    1        1    0.003   100.00        251752    98.85
divide                 1        6    0.000     0.00          2928     1.15
content                0        0    0.000     0.00             0     0.00
---------------------------------------------------------------------------
total:                 2        7    0.003   100.00        254680   100.00