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File relbench.8 of Package john (Revision 819b3a1f45232dd830f0827eea59082a)

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.TH relbench "8" "October 2013" "Lars Vogdt" "John"
.SH NAME
relbench \- John the Ripper benchmark output comparison tool

.SH SYNOPSIS
.B relbench <BENCHMARK-FILE-1> <BENCHMARK-FILE-2>
.br

.SH DESCRIPTION
.B relbench
is a Perl script to compare two "john --test" benchmark runs, such as for
different machines, "make" targets, C compilers, optimization options, or/and
versions of John the Ripper.

To use it, redirect the output of each "john --test" run to a file, then run the
script on the two files.

Most values output by the script indicate relative performance seen on the
second benchmark run as compared to the first one, with the value of 1.0
indicating no change, values higher than 1.0 indicating speedup, and values
lower than 1.0 indicating slowdown.  Specifically, the script outputs the
minimum, maximum, median, and geometric mean for the speedup (or slowdown) seen
across the many individual benchmarks that "john --test" performs.

It also outputs the median absolute deviation (relative to the median) and
geometric standard deviation (relative to the geometric mean).  Of these two, a
median absolute deviation of 0.0 would indicate that no deviation from the
median is prevalent, whereas a geometric standard deviation of 1.0 would
indicate that all benchmarks were sped up or slowed down by the exact same
ratio or their speed remained unchanged.

In practice, these values will tend to deviate from 0.0 and 1.0, respectively.
.SH OPTIONS
.TP
\fBBENCHMARK-FILE-1\fR
File containing benchmark results from the first test run via \fBjohn \-\-test\fR.
.TP
\fBBENCHMARK-FILE-2\fR
File containing benchmark results from the second test run via \fBjohn \-\-test\fR.

.SH FILES
.TP
.IP /usr/sbin/relbench
.SH AUTHOR
John the Ripper password cracker is free and Open Source software. 
Copyright (c) 2011 by Solar Designer.

This manual page was written by Lars Vogdt for the openSUSE operating system 
(but it may be freely used, modified, and redistributed by others).

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