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Displays statistics relating to memory usage and execution time.
Obtains individual statistics.
Statistics key (see ref-mgc-ove-sta).
list of integer
List of statistics.
statistics/0 displays various statistics
relating to memory usage, runtime and garbage collection, including
information about which areas of memory have overflowed and how much time
has been spent expanding them. The printing is handled by
Garbage collection statistics are initialized to zero when a Prolog session starts. The statistics increase until the session is over.
statistics/2 is usually used with Keyword instantiated to
a keyword such as
runtime and List unbound. The predicate
then binds List to a list of statistics related to the keyword.
It can be used in programs that depend on current runtime
statistical information for their control strategy, and in programs
that choose to format and write out their own statistical summaries.
To report information on the runtime of
p/0, add the following to your program:
:- statistics(runtime, [T0|_]), p, statistics(runtime, [T1|_]), T is T1 - T0, format('p/0 took ~3d sec.~n', [T]).