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# profiler(n) 0.3 tcllib "Tcl Profiler"

## 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 command.

## 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 specified, 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 function 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 display 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 command 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 profiler 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 function 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 Trackers. Please also report any ideas for enhancements you may have for either package and/or documentation.

## Keywords

performance, profile, speed

## Category

Programming tools