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diff --git a/slideshow/qa/debug/timings.pl b/slideshow/qa/debug/timings.pl
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+:
+eval 'exec perl -wS $0 ${1+"$@"}'
+    if 0;
+# POD Documentation
+
+=head1 PROGRAM NAME AND AUTHOR
+
+Timings - $Revision: 1.2 $
+Last changes: $Author: rt $ $Date: 2004-11-26 18:43:32 $
+
+=head1 WHAT IT IS
+
+Extract move effect timings from a verbose trace log of the
+presentation engine. Generated is a gnuplot data file, which can be
+displayed issuing a 'gnuplot <filename>' or at a gnuplot prompt, via
+'load <filename>'.
+
+To generate such a verbose log file, rebuild module canvas and module
+slideshow with VERBOSE=t defined in the environment, and debug=t at
+the build tool command line. Then run the presentation, and redirect
+stdout to your log file.
+
+Call me like this: timings.pl < trace-file > gnuplot-target
+
+The whole point in doing this is to detect jerks in shape movements,
+which manifest themselves clearly in the graphed gnuplot output. Note
+that there's some heuristic to recognize when one effect ends and
+another has started: If the time difference between two subsequent
+page flipping times is more than one second, a new effect is assumed
+and a new gnuplot data record is generated.
+
+=head1 REQUIREMENTS
+
+Perl 5
+
+=cut
+
+##############################################################################
+#
+
+print "# Autogenerated by timings.pl, do not change\n",
+      "set ylabel \"position\"\n",
+      "set xlabel \"time\"\n",
+      "plot '-' index 0 using (\$1):(\$2) title \"Move effect position\" with lp\n",
+      "#0\n";
+
+$state = 0;
+$last_time = 0;
+$record = 1;
+
+while( <> )
+{
+    if( $state == 0 && m|next position will be| )
+    {
+        ($posX) = m|.*\(([0-9]+.[0-9]+),|;
+        ($posY) = m|.*,([0-9]+.[0-9]+)\)|;
+        $state = 1;
+    }
+    elsif( $state == 1 && m|output pos is| )
+    {
+        $state = 2;
+    }
+    elsif( $state == 2 && m|flip done at| )
+    {
+        $state = 0;
+        ($flippingTime) = m|.*at ([0-9]+.[0-9]+)|;
+
+        if( $last_time != 0 )
+        {
+            if( $last_time + 1.0 < $flippingTime )
+            {
+                # new record
+                print "\n\n#", $record, "\n";
+                $record++;
+            }
+        }
+
+        $last_time = $flippingTime;
+        print $flippingTime, " ", $posX, " ", $posY, "\n";
+    }
+}