Profile of Config.pm

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NYTProf Performance Profile «line view»
For examples/benchmark4.pl
Run on Thu Aug 28 19:01:43 2014
Reported on Thu Aug 28 19:02:42 2014

Filename | /usr/lib/perl/5.18/Config.pm
Statements | Executed 52 statements in 726µs

Subroutines
Calls | P | F | Exclusive Time | Inclusive Time | Subroutine
--- | --- | --- | --- | --- | ---
1 | 1 | 1 | 430µs | 756µs | Config::::BEGIN@11Config::BEGIN@11
2 | 2 | 2 | 19µs | 19µs | Config::::importConfig::import
10 | 8 | 2 | 18µs | 18µs | Config::::FETCHConfig::FETCH
1 | 1 | 1 | 11µs | 23µs | Config::::BEGIN@9Config::BEGIN@9
1 | 1 | 1 | 7µs | 18µs | Config::::BEGIN@47Config::BEGIN@47
1 | 1 | 1 | 7µs | 11µs | Config::::BEGIN@10Config::BEGIN@10
1 | 1 | 1 | 2µs | 2µs | Config::::TIEHASHConfig::TIEHASH
0 | 0 | 0 | 0s | 0s | Config::::AUTOLOADConfig::AUTOLOAD
0 | 0 | 0 | 0s | 0s | Config::::DESTROYConfig::DESTROY

Call graph for these subroutines as a Graphviz dot language file.

Line | State ments | Time on line | Calls | Time in subs | Code
--- | --- | --- | --- | --- | ---
1 |  |  |  |  | # This file was created by configpm when Perl was built. Any changes
2 |  |  |  |  | # made to this file will be lost the next time perl is built.
3 |  |  |  |  |
4 |  |  |  |  | # for a description of the variables, please have a look at the
5 |  |  |  |  | # Glossary file, as written in the Porting folder, or use the url:
6 |  |  |  |  | # http://perl5.git.perl.org/perl.git/blob/HEAD:/Porting/Glossary
7 |  |  |  |  |
8 |  |  |  |  | package Config;
9 | 2 | 24µs | 2 | 35µs | # spent 23µs (11+12) within Config::BEGIN@9 which was called: # once (11µs+12µs) by DynaLoader::BEGIN@21 at line 9 use strict; # spent 23µs making 1 call to Config::BEGIN@9 # spent 12µs making 1 call to strict::import
10 | 2 | 24µs | 2 | 14µs | # spent 11µs (7+4) within Config::BEGIN@10 which was called: # once (7µs+4µs) by DynaLoader::BEGIN@21 at line 10 use warnings; # spent 11µs making 1 call to Config::BEGIN@10 # spent 4µs making 1 call to warnings::import
11 | 2 | 217µs | 2 | 788µs | # spent 756µs (430+327) within Config::BEGIN@11 which was called: # once (430µs+327µs) by DynaLoader::BEGIN@21 at line 11 use vars '%Config', '$VERSION'; # spent 756µs making 1 call to Config::BEGIN@11 # spent 32µs making 1 call to vars::import
12 |  |  |  |  |
13 | 1 | 700ns |  |  | $VERSION = "5.018002";
14 |  |  |  |  |
15 |  |  |  |  | # Skip @Config::EXPORT because it only contains %Config, which we special
16 |  |  |  |  | # case below as it's not a function. @Config::EXPORT won't change in the
17 |  |  |  |  | # lifetime of Perl 5.
18 | 1 | 3µs |  |  | my %Export_Cache = (myconfig => 1, config_sh => 1, config_vars => 1,
19 |  |  |  |  | config_re => 1, compile_date => 1, local_patches => 1,
20 |  |  |  |  | bincompat_options => 1, non_bincompat_options => 1,
21 |  |  |  |  | header_files => 1);
22 |  |  |  |  |
23 | 1 | 700ns |  |  | @Config::EXPORT = qw(%Config);
24 | 1 | 2µs |  |  | @Config::EXPORT_OK = keys %Export_Cache;
25 |  |  |  |  |
26 |  |  |  |  | # Need to stub all the functions to make code such as print Config::config_sh
27 |  |  |  |  | # keep working
28 |  |  |  |  |
29 |  |  |  |  | sub bincompat_options;
30 |  |  |  |  | sub compile_date;
31 |  |  |  |  | sub config_re;
32 |  |  |  |  | sub config_sh;
33 |  |  |  |  | sub config_vars;
34 |  |  |  |  | sub header_files;
35 |  |  |  |  | sub local_patches;
36 |  |  |  |  | sub myconfig;
37 |  |  |  |  | sub non_bincompat_options;
38 |  |  |  |  |
39 |  |  |  |  | # Define our own import method to avoid pulling in the full Exporter:
40 |  |  |  |  | # spent 19µs within Config::import which was called 2 times, avg 9µs/call: # once (10µs+0s) by DynaLoader::BEGIN@21 at line 21 of DynaLoader.pm # once (9µs+0s) by lib::BEGIN@6 at line 6 of lib.pm sub import {
41 | 2 | 400ns |  |  | shift;
42 | 2 | 3µs |  |  | @_ = @Config::EXPORT unless @_;
43 |  |  |  |  |
44 | 2 | 3µs |  |  | my @funcs = grep $_ ne '%Config', @_;
45 | 2 | 1µs |  |  | my $export_Config = @funcs < @_ ? 1 : 0;
46 |  |  |  |  |
47 | 2 | 309µs | 2 | 28µs | # spent 18µs (7+10) within Config::BEGIN@47 which was called: # once (7µs+10µs) by DynaLoader::BEGIN@21 at line 47 no strict 'refs'; # spent 18µs making 1 call to Config::BEGIN@47 # spent 10µs making 1 call to strict::unimport
48 | 2 | 1µs |  |  | my $callpkg = caller(0);
49 | 2 | 2µs |  |  | foreach my $func (@funcs) {
50 |  |  |  |  | die qq{"$func" is not exported by the Config module\n}
51 |  |  |  |  | unless $Export_Cache{$func};
52 |  |  |  |  | *{$callpkg.'::'.$func} = \&{$func};
53 |  |  |  |  | }
54 |  |  |  |  |
55 | 2 | 6µs |  |  | *{"$callpkg\::Config"} = \%Config if $export_Config;
56 | 2 | 9µs |  |  | return;
57 |  |  |  |  | }
58 |  |  |  |  |
59 | 1 | 36µs | 1 | 6µs | die "Perl lib version (5.18.2) doesn't match executable '$0' version ($])" # spent 6µs making 1 call to version::(bool
60 |  |  |  |  | unless $^V;
61 |  |  |  |  |
62 | 1 | 11µs | 1 | 6µs | $^V eq 5.18.2 # spent 6µs making 1 call to version::(cmp
63 |  |  |  |  | or die "Perl lib version (5.18.2) doesn't match executable '$0' version (" .
64 |  |  |  |  | sprintf("v%vd",$^V) . ")";
65 |  |  |  |  |
66 |  |  |  |  | # spent 18µs within Config::FETCH which was called 10 times, avg 2µs/call: # 3 times (6µs+0s) by Benchmark::BEGIN@453 at line 39 of DynaLoader.pm, avg 2µs/call # once (4µs+0s) by main::BEGIN@4 at line 10 of lib.pm # once (2µs+0s) by main::BEGIN@4 at line 11 of lib.pm # once (2µs+0s) by main::BEGIN@4 at line 12 of lib.pm # once (2µs+0s) by Benchmark::BEGIN@453 at line 58 of DynaLoader.pm # once (1µs+0s) by Benchmark::BEGIN@453 at line 62 of DynaLoader.pm # once (1µs+0s) by Benchmark::BEGIN@453 at line 61 of DynaLoader.pm # once (1µs+0s) by Benchmark::BEGIN@453 at line 60 of DynaLoader.pm sub FETCH {
67 | 10 | 3µs |  |  | my($self, $key) = @_;
68 |  |  |  |  |
69 |  |  |  |  | # check for cached value (which may be undef so we use exists not defined)
70 | 10 | 36µs |  |  | return exists $self->{$key} ? $self->{$key} : $self->fetch_string($key);
71 |  |  |  |  | }
72 |  |  |  |  |
73 |  |  |  |  | # spent 2µs within Config::TIEHASH which was called: # once (2µs+0s) by DynaLoader::BEGIN@21 at line 86 sub TIEHASH {
74 | 1 | 4µs |  |  | bless $_[1], $_[0];
75 |  |  |  |  | }
76 |  |  |  |  |
77 |  |  |  |  | sub DESTROY { }
78 |  |  |  |  |
79 |  |  |  |  | sub AUTOLOAD {
80 |  |  |  |  | require 'Config_heavy.pl';
81 |  |  |  |  | goto \&launcher unless $Config::AUTOLOAD =~ /launcher$/;
82 |  |  |  |  | die "&Config::AUTOLOAD failed on $Config::AUTOLOAD";
83 |  |  |  |  | }
84 |  |  |  |  |
85 |  |  |  |  | # tie returns the object, so the value returned to require will be true.
86 | 1 | 30µs | 1 | 2µs | tie %Config, 'Config', { # spent 2µs making 1 call to Config::TIEHASH
87 |  |  |  |  | archlibexp => '/usr/lib/perl/5.18',
88 |  |  |  |  | archname => 'x86_64-linux-gnu-thread-multi',
89 |  |  |  |  | cc => 'cc',
90 |  |  |  |  | d_readlink => 'define',
91 |  |  |  |  | d_symlink => 'define',
92 |  |  |  |  | dlext => 'so',
93 |  |  |  |  | dlsrc => 'dl_dlopen.xs',
94 |  |  |  |  | dont_use_nlink => undef,
95 |  |  |  |  | exe_ext => '',
96 |  |  |  |  | inc_version_list => '5.18.1',
97 |  |  |  |  | intsize => '4',
98 |  |  |  |  | ldlibpthname => 'LD_LIBRARY_PATH',
99 |  |  |  |  | libpth => '/usr/local/lib /lib/x86_64-linux-gnu /lib/../lib /usr/lib/x86_64-linux-gnu /usr/lib/../lib /lib /usr/lib',
100 |  |  |  |  | osname => 'linux',
101 |  |  |  |  | osvers => '3.2.0-58-generic',
102 |  |  |  |  | path_sep => ':',
103 |  |  |  |  | privlibexp => '/usr/share/perl/5.18',
104 |  |  |  |  | scriptdir => '/usr/bin',
105 |  |  |  |  | sitearchexp => '/usr/local/lib/perl/5.18.2',
106 |  |  |  |  | sitelibexp => '/usr/local/share/perl/5.18.2',
107 |  |  |  |  | so => 'so',
108 |  |  |  |  | useithreads => 'define',
109 |  |  |  |  | usevendorprefix => 'define',
110 |  |  |  |  | version => '5.18.2',
111 |  |  |  |  | };