/usr/local/lib/swipl/library/statistics.pl
All Application Manual Name SummaryHelp

  • swipl
    • library
      • error.pl
      • debug.pl -- Print debug messages and test assertions
      • apply.pl -- Apply predicates on a list
      • lists.pl
      • broadcast.pl -- Event service
      • shlib.pl -- Utility library for loading foreign objects (DLLs, shared objects)
      • option.pl
      • thread_pool.pl -- Resource bounded thread management
      • gensym.pl -- Generate unique symbols
      • settings.pl -- Setting management
      • arithmetic.pl -- Extensible arithmetic
      • main.pl -- Provide entry point for scripts
      • readutil.pl -- Read utilities
      • operators.pl
      • pairs.pl -- Operations on key-value lists
      • prolog_source.pl -- Examine Prolog source-files
      • record.pl
      • quasi_quotations.pl -- Define Quasi Quotation syntax
      • pure_input.pl -- Pure Input from files and streams
      • solution_sequences.pl -- Modify solution sequences
      • ordsets.pl -- Ordered set manipulation
      • random.pl -- Random numbers
      • base64.pl
      • aggregate.pl -- Aggregation operators on backtrackable predicates
      • yall.pl -- Lambda expressions
      • sandbox.pl -- Sandboxed Prolog code
      • apply_macros.pl -- Goal expansion rules to avoid meta-calling
      • assoc.pl
      • prolog_format.pl -- Analyse format specifications
      • predicate_options.pl
      • csv.pl -- Process CSV (Comma-Separated Values) data
      • pprint.pl -- Pretty Print Prolog terms
      • atom.pl -- Operations on atoms
      • modules.pl -- Module utility predicates
      • occurs.pl -- Finding and counting sub-terms
      • prolog_xref.pl
      • prolog_colour.pl -- Prolog syntax colouring support.
      • lazy_lists.pl -- Lazy list handling
      • ugraphs.pl -- Graph manipulation library
      • url.pl -- Analysing and constructing URL
      • www_browser.pl -- Open a URL in the users browser
      • prolog_pack.pl
      • git.pl -- Run GIT commands
      • utf8.pl -- UTF-8 encoding/decoding on lists of character codes.
      • dialect.pl -- Support multiple Prolog dialects
      • system.pl -- System utilities
      • terms.pl -- Term manipulation
      • date.pl -- Process dates and times
      • persistency.pl -- Provide persistent dynamic predicates
      • iostream.pl -- Utilities to deal with streams
      • prolog_stack.pl -- Examine the Prolog stack
      • edinburgh.pl
      • prolog_clause.pl
      • prolog_breakpoints.pl -- Manage Prolog break-points
      • wfs.pl -- Well Founded Semantics interface
      • prolog_code.pl -- Utilities for reasoning about code
      • sort.pl
      • dicts.pl -- Dict utilities
      • dif.pl
      • varnumbers.pl -- Utilities for numbered terms
      • pio.pl -- Pure I/O
      • base32.pl
      • charsio.pl -- I/O on Lists of Character Codes
      • codesio.pl -- I/O on Lists of Character Codes
      • coinduction.pl
      • heaps.pl -- heaps/priority queues
      • rbtrees.pl -- Red black trees
      • statistics.pl -- Get information about resource usage
        • statistics/0
        • statistics/1
        • thread_statistics/2
        • time/1
        • call_time/2
        • call_time/3
      • when.pl -- Conditional coroutining
      • backcomp.pl -- Backward compatibility
      • ctypes.pl -- Character code classification
      • prolog_trace.pl -- Print access to predicates
      • writef.pl
      • listing.pl -- List programs and pretty print clauses
      • nb_set.pl -- Non-backtrackable sets
      • ansi_term.pl -- Print decorated text to ANSI consoles
      • prolog_versions.pl -- Demand specific (Prolog) versions
      • prolog_config.pl
      • prolog_wrap.pl -- Wrapping predicates
      • tty.pl
      • hashtable.pl
      • prolog_history.pl
      • optparse.pl
      • strings.pl -- String utilities
      • fastrw.pl
      • prolog_metainference.pl
      • prolog_codewalk.pl -- Prolog code walker
      • prolog_debug.pl
      • threadutil.pl -- Interactive thread utilities
      • thread.pl -- High level thread primitives
      • prolog_profile.pl -- Execution profiler
      • make.pl
      • check.pl -- Consistency checking
      • tables.pl
      • increval.pl
      • help.pl
      • oset.pl
      • explain.pl
      • macros.pl
      • shell.pl
      • prolog_coverage.pl -- Coverage analysis tool
      • quintus.pl
 call_time(:Goal, -Time:dict)
 call_time(:Goal, -Time:dict, -Result)
Call Goal as call/1, unifying Time with a dict that provides information on the resource usage. If Goal succeeds with a choice point, backtracking reports the time used to find the next answer, failure or exception. If Goal succeeds deterministically no choice point is left open. Currently Time contains the keys below. Future versions may provide additional keys.
  • wall:Seconds
  • cpu:Seconds
  • inferences:Count

call_time/2 is defined as below. Note that for call_time/2 the time is only available if Goal succeeds.

call_time(Goal, Time) :-
    call_time(Goal, Time, Result),
    call(Result).
Arguments:
Result- is one of true, false or throw(E), depending on whether or not the goal succeeded or raised an exception. Note that Result may be called using call/1 to propagate the failure or exception.