To generate a time and allocation profile, give one of the
following RTS options to the compiled program when you run it (RTS
options should be enclosed between +RTS...-RTS
as usual):
-p or -P:
The -p option produces a standard
time profile report. It is written
into the file
program.prof
The -P option produces a more
detailed report containing the actual time and allocation
data as well. (Not used much.)
-xc
This option makes use of the extra information maintained by the cost-centre-stack profiler to provide useful information about the location of runtime errors. See Section 4.14.6, “RTS options for hackers, debuggers, and over-interested souls”.