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

  • swipl
    • library
      • error.pl
      • debug.pl
      • apply.pl
      • lists.pl
      • broadcast.pl -- Event service
      • predicate_options.pl
      • shlib.pl
      • option.pl
      • thread_pool.pl
      • gensym.pl
      • settings.pl -- Setting management
      • arithmetic.pl
      • main.pl -- Provide entry point for scripts
      • readutil.pl
      • operators.pl -- Manage operators
      • pairs.pl -- Operations on key-value lists
      • prolog_source.pl -- Examine Prolog source-files
      • record.pl -- Access compound arguments by name
      • 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 -- Base64 encoding and decoding
      • 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 -- Binary associations
      • prolog_format.pl -- Analyse format specifications
      • 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 cross-referencer data collection
      • prolog_colour.pl
      • lazy_lists.pl -- Lazy list handling
      • ugraphs.pl -- Graph manipulation library
      • iostream.pl -- Utilities to deal with streams
      • url.pl -- Analysing and constructing URL
      • www_browser.pl -- Open a URL in the users browser
      • prolog_pack.pl -- A package manager for Prolog
      • git.pl -- Run GIT commands
      • rbtrees.pl -- Red black trees
      • dif.pl -- The dif/2 constraint
      • charsio.pl -- I/O on Lists of Character Codes
      • prolog_stack.pl -- Examine the Prolog stack
      • edinburgh.pl -- Some traditional Edinburgh predicates
      • prolog_clause.pl -- Get detailed source-information about a clause
      • prolog_breakpoints.pl -- Manage Prolog break-points
      • wfs.pl -- Well Founded Semantics interface
      • dialect.pl -- Support multiple Prolog dialects
      • prolog_code.pl -- Utilities for reasoning about code
      • sort.pl
      • dicts.pl -- Dict utilities
      • varnumbers.pl -- Utilities for numbered terms
      • strings.pl -- String utilities
      • base32.pl -- Base32 encoding and decoding
      • codesio.pl -- I/O on Lists of Character Codes
      • coinduction.pl -- Co-Logic Programming
      • date.pl -- Process dates and times
      • heaps.pl -- heaps/priority queues
      • statistics.pl -- Get information about resource usage
        • statistics/0
        • statistics/1
        • thread_statistics/2
        • time/1
        • call_time/2
        • call_time/3
      • terms.pl -- Term manipulation
      • when.pl -- Conditional coroutining
      • backcomp.pl -- Backward compatibility
      • optparse.pl -- command line parsing
      • prolog_autoload.pl -- Autoload all dependencies
      • check.pl -- Consistency checking
      • prolog_config.pl -- Provide configuration information
      • help.pl -- Text based manual
      • prolog_wrap.pl -- Wrapping predicates
      • macros.pl -- Macro expansion
      • fastrw.pl -- Fast reading and writing of terms
      • prolog_versions.pl -- Demand specific (Prolog) versions
      • portray_text.pl -- Portray text
      • zip.pl -- Access resource ZIP archives
      • prolog_trace.pl -- Print access to predicates
      • explain.pl -- Describe Prolog Terms
      • prolog_metainference.pl -- Infer meta-predicate properties
      • increval.pl -- Incremental dynamic predicate modification
      • tables.pl -- XSB interface to tables
      • quintus.pl -- Quintus compatibility
      • shell.pl -- Elementary shell commands
      • make.pl -- Reload modified source files
 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.