'\"
'\" Generated from file 'bench_lang_spec\&.man' by tcllib/doctools with format 'nroff'
'\" Copyright (c) 2007 Andreas Kupries <andreas_kupries@users\&.sourceforge\&.net>
'\"
.TH "bench_lang_spec" n 1\&.0 tcllib "Documentation tools"
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.SH NAME
bench_lang_spec \- bench language specification
.SH SYNOPSIS
\fBbench_rm\fR \fIpath\fR\&.\&.\&.
.sp
\fBbench_tmpfile\fR
.sp
\fBbench\fR \fIoptions\fR\&.\&.\&.
.sp
.BE
.SH DESCRIPTION
.PP
This document specifies both names and syntax of all the commands
which together are the bench language, version 1\&.
As this document is intended to be a reference the commands are listed
in alphabetical order, and the descriptions are relatively short\&.
A beginner should read the more informally written
\fIbench language introduction\fR first\&.
.SH COMMANDS
.TP
\fBbench_rm\fR \fIpath\fR\&.\&.\&.
This command silently removes the files specified as its arguments and
then returns the empty string as its result\&.
The command is \fItrusted\fR, there is no checking if the specified
files are outside of whatever restricted area the benchmarks are run
in\&.
.TP
\fBbench_tmpfile\fR
This command returns the path to a bench specific unique temporary
file\&. The uniqueness means that multiple calls will return different
paths\&. While the path may exist from previous runs, the command itself
does \fInot\fR create aynthing\&.
.sp
The base location of the temporary files is platform dependent:
.RS
.TP
Unix, and indeterminate platform
"\fI/tmp\fR"
.TP
Windows
\fB$TEMP\fR
.TP
Anything else
The current working directory\&.
.RE
.sp
.TP
\fBbench\fR \fIoptions\fR\&.\&.\&.
This command declares a single benchmark\&. Its result is the empty
string\&. All parts of the benchmark are declared via options, and their
values\&. The options can occur in any order\&. The accepted options are:
.RS
.TP
\fB-body\fR script
The argument of this option declares the body of the benchmark, the
Tcl script whose performance we wish to measure\&. This option, and
\fB-desc\fR, are the two required parts of each benchmark\&.
.TP
\fB-desc\fR msg
The argument of this option declares the name of the benchmark\&. It has
to be unique, or timing data from different benchmarks will be mixed
together\&.
.sp
\fIBeware!\fR This requirement is not checked when benchmarks are
executed, and the system will silently produce bogus data\&. This
option, and \fB-body\fR, are the two required parts of each
benchmark\&.
.TP
\fB-ipost\fR script
The argument of this option declares a script which is run immediately
\fIafter\fR each iteration of the body\&. Its responsibility is to
release resources created by the body, or \fB-ipre\fR-bodym which
we do not wish to live into the next iteration\&.
.TP
\fB-ipre\fR script
The argument of this option declares a script which is run immediately
\fIbefore\fR each iteration of the body\&. Its responsibility is to
create the state of the system expected by the body so that we measure
the right thing\&.
.TP
\fB-iterations\fR num
The argument of this option declares the maximum number of times to
run the \fB-body\fR of the benchmark\&. During execution this and the
global maximum number of iterations are compared and the smaller of
the two values is used\&.
.sp
This option should be used only for benchmarks which are expected or
known to take a long time per run\&. I\&.e\&. reduce the number of times
they are run to keep the overall time for the execution of the whole
benchmark within manageable limits\&.
.TP
\fB-post\fR script
The argument of this option declares a script which is run
\fIafter\fR all iterations of the body have been run\&. Its
responsibility is to release resources created by the body,
or \fB-pre\fR-body\&.
.TP
\fB-pre\fR script
The argument of this option declares a script which is run
\fIbefore\fR any of the iterations of the body are run\&. Its
responsibility is to create whatever resources are needed by the body
to run without failing\&.
.RE
.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 \fIbench\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 "SEE ALSO"
bench_intro, bench_lang_intro
.SH KEYWORDS
bench language, benchmark, performance, specification, testing
.SH CATEGORY
Benchmark tools
.SH COPYRIGHT
.nf
Copyright (c) 2007 Andreas Kupries <andreas_kupries@users\&.sourceforge\&.net>

.fi
