Profile of Exporter.pm

Filename	/System/Library/Perl/5.12/Exporter.pm
Statements	Executed 41 statements in 177µs

Subroutines
Calls	P	F	Exclusive Time	Inclusive Time	Subroutine
2	2	2	123µs	129µs	Exporter::::importExporter::import
4	1	1	6µs	6µs	Exporter::::CORE:matchExporter::CORE:match (opcode)
0	0	0	0s	0s	Exporter::::__ANON__[:62]Exporter::__ANON__[:62]
0	0	0	0s	0s	Exporter::::as_heavyExporter::as_heavy
0	0	0	0s	0s	Exporter::::exportExporter::export
0	0	0	0s	0s	Exporter::::export_failExporter::export_fail
0	0	0	0s	0s	Exporter::::export_ok_tagsExporter::export_ok_tags
0	0	0	0s	0s	Exporter::::export_tagsExporter::export_tags
0	0	0	0s	0s	Exporter::::export_to_levelExporter::export_to_level
0	0	0	0s	0s	Exporter::::require_versionExporter::require_version

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

Line	State ments	Time on line	Calls	Time in subs	Code
1					package Exporter;
2
3	1	27µs			require 5.006;
4
5					# Be lean.
6					#use strict;
7					#no strict 'refs';
8
9	1	400ns			our $Debug = 0;
10	1	200ns			our $ExportLevel = 0;
11	1	400ns			our $Verbose \|\|= 0;
12	1	600ns			our $VERSION = '5.64_01';
13	1	300ns			our (%Cache);
14
15					sub as_heavy {
16					require Exporter::Heavy;
17					# Unfortunately, this does not work if the caller is aliased as *name = \&foo
18					# Thus the need to create a lot of identical subroutines
19					my $c = (caller(1))[3];
20					$c =~ s/.*:://;
21					\&{"Exporter::Heavy::heavy_$c"};
22					}
23
24					sub export {
25					goto &{as_heavy()};
26					}
27
28					# spent 129µs (123+6) within Exporter::import which was called 2 times, avg 64µs/call: # once (77µs+4µs) by Data::Dumper::BEGIN@20 at line 20 of Data/Dumper.pm # once (46µs+2µs) by Parse::Lexer::BEGIN@17 at line 17 of Parse/Lexer.pm sub import {
29	2	2µs			my $pkg = shift;
30	2	2µs			my $callpkg = caller($ExportLevel);
31
32	2	1µs			if ($pkg eq "Exporter" and @_ and $_[0] eq "import") {
33					*{$callpkg."::import"} = \&import;
34					return;
35					}
36
37					# We need to treat @{"$pkg\::EXPORT_FAIL"} since Carp uses it :-(
38	2	11µs			my($exports, $fail) = (\@{"$pkg\::EXPORT"}, \@{"$pkg\::EXPORT_FAIL"});
39	2	6µs			return export $pkg, $callpkg, @_
40					if $Verbose or $Debug or @$fail > 1;
41	2	4µs			my $export_cache = ($Cache{$pkg} \|\|= {});
42	2	6µs			my $args = @_ or @_ = @$exports;
43
44	2	500ns			local $_;
45	2	500ns			if ($args and not %$export_cache) {
46					s/^&//, $export_cache->{$_} = 1
47					foreach (@$exports, @{"$pkg\::EXPORT_OK"});
48					}
49	2	300ns			my $heavy;
50					# Try very hard not to use {} and hence have to enter scope on the foreach
51					# We bomb out of the loop with last as soon as heavy is set.
52	2	2µs			if ($args or $fail) {
53					($heavy = (/\W/ or $args and not exists $export_cache->{$_}
54					or @$fail and $_ eq $fail->[0])) and last
55	4	40µs	4	6µs	foreach (@_); # spent 6µs making 4 calls to Exporter::CORE:match, avg 2µs/call
56					} else {
57					($heavy = /\W/) and last
58					foreach (@_);
59					}
60	2	300ns			return export $pkg, $callpkg, ($args ? @_ : ()) if $heavy;
61					local $SIG{__WARN__} =
62	2	15µs			sub {require Carp; &Carp::carp};
63					# shortcut for the common case of no type character
64	4	41µs			*{"$callpkg\::$_"} = \&{"$pkg\::$_"} foreach @_;
65					}
66
67					# Default methods
68
69					sub export_fail {
70					my $self = shift;
71					@_;
72					}
73
74					# Unfortunately, caller(1)[3] "does not work" if the caller is aliased as
75					# *name = \&foo. Thus the need to create a lot of identical subroutines
76					# Otherwise we could have aliased them to export().
77
78					sub export_to_level {
79					goto &{as_heavy()};
80					}
81
82					sub export_tags {
83					goto &{as_heavy()};
84					}
85
86					sub export_ok_tags {
87					goto &{as_heavy()};
88					}
89
90					sub require_version {
91					goto &{as_heavy()};
92					}
93
94	1	17µs			1;
95					__END__

					# spent 6µs within Exporter::CORE:match which was called 4 times, avg 2µs/call: # 4 times (6µs+0s) by Exporter::import at line 55, avg 2µs/call sub Exporter::CORE:match; # opcode