--- /dev/null
+## Copyright (C) 2012 Daniel Kraft
+##
+## This file is part of Octave.
+##
+## Octave is free software; you can redistribute it and/or modify it
+## under the terms of the GNU General Public License as published by
+## the Free Software Foundation; either version 3 of the License, or (at
+## your option) any later version.
+##
+## Octave is distributed in the hope that it will be useful, but
+## WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+## General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with Octave; see the file COPYING. If not, see
+## <http://www.gnu.org/licenses/>.
+
+## -*- texinfo -*-
+## @deftypefn {Function File} {} profshow (@var{data})
+## @deftypefnx {Function File} {} profshow (@var{data}, @var{n})
+## Show flat profiler results.
+##
+## This command prints out profiler data as a flat profile. @var{data} is the
+## structure returned by @code{profile ('info')}. If @var{n} is given, it
+## specifies the number of functions to show in the profile; functions are
+## sorted in descending order by total time spent in them. If there are more
+## than @var{n} included in the profile, those will not be shown. @var{n}
+## defaults to 20.
+##
+## The attribute column shows @samp{R} for recursive functions and nothing
+## otherwise.
+## @seealso{profexplore, profile}
+## @end deftypefn
+
+## Built-in profiler.
+## Author: Daniel Kraft <d@domob.eu>
+
+function profshow (data, n = 20)
+
+ if (nargin < 1 || nargin > 2)
+ print_usage ();
+ endif
+
+ n = fix (n);
+ if (! isscalar (n) || ! isreal (n) || ! (n > 0))
+ error ("profile: N must be a positive integer");
+ endif
+
+ m = length (data.FunctionTable);
+ n = min (n, m);
+
+ ## We want to sort by times in descending order. For this, extract the
+ ## times to an array, then sort this, and use the resulting index permutation
+ ## to print out our table.
+ times = -[ data.FunctionTable.TotalTime ];
+
+ [~, p] = sort (times);
+
+ ## For printing the table, find out the maximum length of a function name
+ ## so that we can proportion the table accordingly. Based on this,
+ ## we can build the format used for printing table rows.
+ nameLen = length ("Function");
+ for i = 1 : n
+ nameLen = max (nameLen, length (data.FunctionTable(p(i)).FunctionName));
+ endfor
+ headerFormat = sprintf ("%%4s %%%ds %%4s %%12s %%12s\n", nameLen);
+ rowFormat = sprintf ("%%4d %%%ds %%4s %%12.3f %%12d\n", nameLen);
+
+ printf (headerFormat, "#", "Function", "Attr", "Time (s)", "Calls");
+ printf ("%s\n", repmat ("-", 1, nameLen + 2 * 5 + 2 * 13));
+ for i = 1 : n
+ row = data.FunctionTable(p(i));
+ attr = "";
+ if (row.IsRecursive)
+ attr = "R";
+ endif
+ printf (rowFormat, p(i), row.FunctionName, attr, ...
+ row.TotalTime, row.NumCalls);
+ endfor
+
+endfunction
+
+%!demo
+%! profile ("on");
+%! A = rand (100);
+%! B = expm (A);
+%! profile ("off");
+%! T = profile ("info");
+%! profshow (T, 10);
+
+%!demo
+%! profile ("on");
+%! expm (rand (500) + eye (500));
+%! profile ("off");
+%! profshow (profile ("info"), 5);
+
+%!error profshow ();
+%!error profshow (1, 2, 3);
+%!error profshow (struct (), 1.2);