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profiler(n)                                     Tcl Profiler                                     profiler(n)



____________________________________________________________________________________________________________

NAME
       profiler - Tcl source code profiler

SYNOPSIS
       package require Tcl  8.3

       package require profiler  ?0.3?

       ::profiler::init

       ::profiler::dump pattern

       ::profiler::print ?pattern?

       ::profiler::reset ?pattern?

       ::profiler::suspend ?pattern?

       ::profiler::resume ?pattern?

       ::profiler::sortFunctions key

____________________________________________________________________________________________________________

DESCRIPTION
       The  profiler  package  provides a simple Tcl source code profiler.  It is a function-level profiler;
       that is, it collects only function-level information, not the more detailed  line-level  information.
       It operates by redefining the Tcl proc command.  Profiling is initiated via the ::profiler::init com-mand. command.
       mand.

COMMANDS
       ::profiler::init
              Initiate profiling.  All procedures created after this command is called will be profiled.  To
              profile an entire application, this command must be called before any other commands.

       ::profiler::dump pattern
              Dump  profiling  information  for the all functions matching pattern.  If no pattern is speci-fied, specified,
              fied, information for all functions will be returned.  The result is a list of key/value pairs
              that maps function names to information about that function.  The information about each func-tion function
              tion is in turn a list of key/value pairs.  The keys used and their values are:

              totalCalls
                     The total number of times functionName was called.

              callerDist
                     A list of key/value pairs mapping each calling function that called functionName to the
                     number of times it called functionName.

              compileTime
                     The runtime, in clock clicks, of functionName the first time that it was called.

              totalRuntime
                     The sum of the runtimes of all calls of functionName.

              averageRuntime
                     Average runtime of functionName.

              descendantTime
                     Sum of the time spent in descendants of functionName.

              averageDescendantTime
                     Average time spent in descendants of functionName.

       ::profiler::print ?pattern?
              Print  profiling  information for all functions matching pattern.  If no pattern is specified,
              information about all functions will be displayed.  The return result is a human readable dis-play display
              play of the profiling information.

       ::profiler::reset ?pattern?
              Reset  profiling  information for all functions matching pattern.  If no pattern is specified,
              information will be reset for all functions.

       ::profiler::suspend ?pattern?
              Suspend profiling for all functions matching pattern.  If no pattern is  specified,  profiling
              will  be suspended for all functions. It stops gathering profiling information after this com-mand command
              mand is issued. However, it does not erase any profiling information that  has  been  gathered
              previously.  Use resume command to re-enable profiling.

       ::profiler::resume ?pattern?
              Resume  profiling  for  all functions matching pattern.  If no pattern is specified, profiling
              will be resumed for all functions.  This command should be invoked after suspending  the  pro-filer profiler
              filer in the code.

       ::profiler::sortFunctions key
              Return  a  list of functions sorted by a particular profiling statistic.  Supported values for
              key are: calls, exclusiveTime, compileTime,  nonCompileTime,  totalRuntime,  avgExclusiveTime,
              and  avgRuntime.  The return result is a list of lists, where each sublist consists of a func-tion function
              tion name and the value of key for that function.


BUGS, IDEAS, FEEDBACK
       This document, and the package it describes,  will  undoubtedly  contain  bugs  and  other  problems.
       Please   report   such   in   the  category  profiler  of  the  Tcllib  SF  Trackers  [http://source -
       forge.net/tracker/? group_id=12883].  Please also report any ideas for enhancements you may  have  for
       either package and/or documentation.

KEYWORDS
       performance, profile, speed

CATEGORY
       Programming tools



profiler                                             0.3                                         profiler(n)