Devel::NYTProf::Data(3pm)
NAME
Devel::NYTProf::Data - Devel::NYTProf data loading and manipulation
SYNOPSIS
use Devel::NYTProf::Data;
$profile = Devel::NYTProf::Data->new( { filename => 'nytprof.out' } );
$profile->dump_profile_data();
DESCRIPTION
Reads a profile data file written by Devel::NYTProf, aggregates the
contents, and returns the results as a blessed data structure.
Access to the data should be via methods in this class to avoid
breaking encapsulation (and thus breaking your code when the data
structures change in future versions).
XXX Currently the documentation is out of date as this module is
evolving rapidly.
METHODS
- new
- $profile = Devel::NYTProf::Data->new( );
- $profile = Devel::NYTProf::Data->new( {
filename => 'nytprof.out', # default
quiet => 0, # default, 1 to silence message - } );
- Reads the specified file containing profile data written by
Devel::NYTProf, aggregates the contents, and returns the results as a
blessed data structure. - dump_profile_data
- $profile->dump_profile_data;
$profile->dump_profile_data( {filehandle => \*STDOUT,
separator => "", - } );
- Writes the profile data in a reasonably human friendly format to the
sepcified "filehandle" (default STDOUT). - For non-trivial profiles the output can be very large. As a guide,
there'll be at least one line of output for each line of code executed, plus one for each place a subroutine was called from, plus one per
subroutine. - The default format is a Data::Dumper style whitespace-indented tree.
The types of data present can depend on the options used when
profiling. - If "separator" is true then instead of whitespace, each item of data is indented with the path through the structure with "separator" used to separarate the elements of the path. This format is especially useful for grep'ing and diff'ing.
- normalize_variables
- $profile->normalize_variables;
- Traverses the profile data structure and normalizes highly variable
data, such as the time, in order that the data can more easily be
compared. This is mainly of use to the test suite. - The data normalized is:
- o profile timing data: set to 0
- o subroutines: timings are set to 0
- o attributes, like basetime, xs_version, etc., are set to 0
- o filenames: path prefixes matching absolute paths in @INC are
- changed to "/.../"
- o filenames: eval sequence numbers, like "(re_eval 2)" are changed to
- subs_defined_in_file
- $subs_defined_hash = $profile->subs_defined_in_file( $file, $include_lines );
- Returns a reference to a hash containing information about subroutines defined in a source file. The $file argument can be an integer file id (fid) or a file path.
- Returns undef if the profile contains no "sub_subinfo" data for the
$file. - The keys of the returned hash are fully qualified subroutine names and
the corresponding value is a hash reference containing
Devel::NYTProf::SubInfo objects. - If $include_lines is true then the hash also contains integer keys
corresponding to the first line of the subroutine. The corresponding
value is a reference to an array. The array contains a hash ref for
each of the subroutines defined on that line, typically just one. - file_line_range_of_sub
- ($file, $fid, $first, $last, $fi) = $profile->file_line_range_of_sub("main::foo");
- Returns the filename, fid, and first and last line numbers, and
fileinfo object for the specified subroutine (which must be fully
qualified with a package name). - Returns an empty list if the subroutine name is not in the profile
data. - The $fid return is the 'original' fid associated with the file the
subroutine was created in. - The $file returned is the source file that defined the subroutine.
- Subroutines that are implemented in XS have a line range of 0,0 and a
possibly unknown file (if NYTProf couldn't find a good match based on
the package name). - Subroutines that were called but only returned via an exception may
have a line range of undef,undef if they're xsubs or were defined
before NYTProf was enabled. - resolve_fid
- $fid = $profile->resolve_fid( $file );
- Returns the integer file id that corresponds to $file.
- If $file can't be found and $file looks like a positive integer then
it's presumed to already be a fid and is returned. This is used to
enable other methods to work with fid or file arguments. - If $file can't be found but it uniquely matches the suffix of one of
the files then that corresponding fid is returned.
PROFILE DATA STRUTURE
XXX
LIMITATION
There's currently no way to merge profile data from multiple files.
SEE ALSO
Devel::NYTProf
AUTHOR
Adam Kaplan, "<akaplan at nytimes.com>" Tim Bunce,
<http://www.tim.bunce.name> and <http://blog.timbunce.org> Steve
Peters, "<steve at fisharerojo.org>"
COPYRIGHT AND LICENSE
- Copyright (C) 2008 by Adam Kaplan and The New York Times Company.
Copyright (C) 2008,2009 by Tim Bunce, Ireland. - This library is free software; you can redistribute it and/or modify it
under the same terms as Perl itself, either Perl version 5.8.8 or, at
your option, any later version of Perl 5 you may have available.