'\"
'\" Generated from file 'profiler\&.man' by tcllib/doctools with format 'nroff'
'\"
.TH "profiler" n 0\&.3 tcllib "Tcl Profiler"
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.BS
.SH NAME
profiler \- Tcl source code profiler
.SH SYNOPSIS
package require \fBTcl  8\&.3\fR
.sp
package require \fBprofiler  ?0\&.3?\fR
.sp
\fB::profiler::init\fR
.sp
\fB::profiler::dump\fR \fIpattern\fR
.sp
\fB::profiler::print\fR ?\fIpattern\fR?
.sp
\fB::profiler::reset\fR ?\fIpattern\fR?
.sp
\fB::profiler::suspend\fR ?\fIpattern\fR?
.sp
\fB::profiler::resume\fR ?\fIpattern\fR?
.sp
\fB::profiler::sortFunctions\fR \fIkey\fR
.sp
.BE
.SH DESCRIPTION
.PP
The \fBprofiler\fR 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 \fBproc\fR command\&.
Profiling is initiated via the \fB::profiler::init\fR command\&.
.SH COMMANDS
.TP
\fB::profiler::init\fR
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\&.
.TP
\fB::profiler::dump\fR \fIpattern\fR
Dump profiling information for the all functions matching
\fIpattern\fR\&.  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:
.RS
.TP
\fBtotalCalls\fR
The total number of times \fIfunctionName\fR was called\&.
.TP
\fBcallerDist\fR
A list of key/value pairs mapping each calling function that called
\fIfunctionName\fR to the number of times it called
\fIfunctionName\fR\&.
.TP
\fBcompileTime\fR
The runtime, in clock clicks, of \fIfunctionName\fR the first time
that it was called\&.
.TP
\fBtotalRuntime\fR
The sum of the runtimes of all calls of \fIfunctionName\fR\&.
.TP
\fBaverageRuntime\fR
Average runtime of \fIfunctionName\fR\&.
.TP
\fBdescendantTime\fR
Sum of the time spent in descendants of \fIfunctionName\fR\&.
.TP
\fBaverageDescendantTime\fR
Average time spent in descendants of \fIfunctionName\fR\&.
.RE
.TP
\fB::profiler::print\fR ?\fIpattern\fR?
Print profiling information for all functions matching \fIpattern\fR\&.
If no pattern is specified, information about all functions will be
displayed\&.  The return result is a human readable display of the
profiling information\&.
.TP
\fB::profiler::reset\fR ?\fIpattern\fR?
Reset profiling information for all functions matching \fIpattern\fR\&.
If no pattern is specified, information will be reset for all
functions\&.
.TP
\fB::profiler::suspend\fR ?\fIpattern\fR?
Suspend profiling for all functions matching \fIpattern\fR\&.  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\&.
.TP
\fB::profiler::resume\fR ?\fIpattern\fR?
Resume profiling for all functions matching \fIpattern\fR\&.  If no
pattern is specified, profiling will be resumed for all functions\&.
This command should be invoked after suspending the profiler in the
code\&.
.TP
\fB::profiler::sortFunctions\fR \fIkey\fR
Return a list of functions sorted by a particular profiling statistic\&.
Supported values for \fIkey\fR are: \fBcalls\fR,
\fBexclusiveTime\fR, \fBcompileTime\fR, \fBnonCompileTime\fR,
\fBtotalRuntime\fR, \fBavgExclusiveTime\fR, and
\fBavgRuntime\fR\&.  The return result is a list of lists, where each
sublist consists of a function name and the value of \fIkey\fR for
that function\&.
.PP
.SH "BUGS, IDEAS, FEEDBACK"
This document, and the package it describes, will undoubtedly contain
bugs and other problems\&.
Please report such in the category \fIprofiler\fR of the
\fITcllib Trackers\fR [http://core\&.tcl\&.tk/tcllib/reportlist]\&.
Please also report any ideas for enhancements you may have for either
package and/or documentation\&.
.PP
When proposing code changes, please provide \fIunified diffs\fR,
i\&.e the output of \fBdiff -u\fR\&.
.PP
Note further that \fIattachments\fR are strongly preferred over
inlined patches\&. Attachments can be made by going to the \fBEdit\fR
form of the ticket immediately after its creation, and then using the
left-most button in the secondary navigation bar\&.
.SH KEYWORDS
performance, profile, speed
.SH CATEGORY
Programming tools