Profile of Exporter.pm

← Index
NYTProf Performance Profile «line view»
For -e
Run on Thu Mar 24 14:41:10 2016
Reported on Thu Mar 24 14:41:17 2016

Filename | /home/s1/perl5/perlbrew/perls/perl-5.22.0/lib/5.22.0/Exporter.pm
Statements | Executed 22 statements in 89µs

Subroutines
Calls | P | F | Exclusive Time | Inclusive Time | Subroutine
--- | --- | --- | --- | --- | ---
1 | 1 | 1 | 52µs | 59µs | Exporter::::importExporter::import
1 | 1 | 1 | 4µs | 4µs | Exporter::::CORE:matchExporter::CORE:match (opcode)
1 | 1 | 1 | 3µs | 3µs | Exporter::::CORE:substExporter::CORE:subst (opcode)
0 | 0 | 0 | 0s | 0s | Exporter::::__ANON__[:64]Exporter::__ANON__[:64]
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 | 23µs |  |  | require 5.006;
4 |  |  |  |  |
5 |  |  |  |  | # Be lean.
6 |  |  |  |  | #use strict;
7 |  |  |  |  | #no strict 'refs';
8 |  |  |  |  |
9 | 1 | 500ns |  |  | our $Debug = 0;
10 | 1 | 100ns |  |  | our $ExportLevel = 0;
11 | 1 | 800ns |  |  | our $Verbose ||= 0;
12 | 1 | 600ns |  |  | our $VERSION = '5.72';
13 |  |  |  |  | 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 59µs (52+7) within Exporter::import which was called: # once (52µs+7µs) by main::BEGIN@0 at line 0 of -e sub import {
29 | 1 | 1µs |  |  | my $pkg = shift;
30 | 1 | 2µs |  |  | my $callpkg = caller($ExportLevel);
31 |  |  |  |  |
32 | 1 | 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 | 1 | 6µs |  |  | my $exports = \@{"$pkg\::EXPORT"};
39 |  |  |  |  | # But, avoid creating things if they don't exist, which saves a couple of
40 |  |  |  |  | # hundred bytes per package processed.
41 | 1 | 2µs |  |  | my $fail = ${$pkg . '::'}{EXPORT_FAIL} && \@{"$pkg\::EXPORT_FAIL"};
42 | 1 | 300ns |  |  | return export $pkg, $callpkg, @_
43 |  |  |  |  | if $Verbose or $Debug or $fail && @$fail > 1;
44 | 1 | 2µs |  |  | my $export_cache = ($Cache{$pkg} ||= {});
45 | 1 | 400ns |  |  | my $args = @_ or @_ = @$exports;
46 |  |  |  |  |
47 | 1 | 2µs |  |  | if ($args and not %$export_cache) {
48 |  |  |  |  | s/^&//, $export_cache->{$_} = 1
49 | 1 | 13µs | 1 | 3µs | foreach (@$exports, @{"$pkg\::EXPORT_OK"}); # spent 3µs making 1 call to Exporter::CORE:subst
50 |  |  |  |  | }
51 | 1 | 100ns |  |  | my $heavy;
52 |  |  |  |  | # Try very hard not to use {} and hence have to enter scope on the foreach
53 |  |  |  |  | # We bomb out of the loop with last as soon as heavy is set.
54 | 1 | 400ns |  |  | if ($args or $fail) {
55 |  |  |  |  | ($heavy = (/\W/ or $args and not exists $export_cache->{$_}
56 |  |  |  |  | or $fail and @$fail and $_ eq $fail->[0])) and last
57 | 1 | 10µs | 1 | 4µs | foreach (@_); # spent 4µs making 1 call to Exporter::CORE:match
58 |  |  |  |  | } else {
59 |  |  |  |  | ($heavy = /\W/) and last
60 |  |  |  |  | foreach (@_);
61 |  |  |  |  | }
62 | 1 | 200ns |  |  | return export $pkg, $callpkg, ($args ? @_ : ()) if $heavy;
63 |  |  |  |  | local $SIG{__WARN__} =
64 | 1 | 5µs |  |  | sub {require Carp; &Carp::carp} if not $SIG{__WARN__};
65 |  |  |  |  | # shortcut for the common case of no type character
66 | 1 | 14µs |  |  | *{"$callpkg\::$_"} = \&{"$pkg\::$_"} foreach @_;
67 |  |  |  |  | }
68 |  |  |  |  |
69 |  |  |  |  | # Default methods
70 |  |  |  |  |
71 |  |  |  |  | sub export_fail {
72 |  |  |  |  | my $self = shift;
73 |  |  |  |  | @_;
74 |  |  |  |  | }
75 |  |  |  |  |
76 |  |  |  |  | # Unfortunately, caller(1)[3] "does not work" if the caller is aliased as
77 |  |  |  |  | # *name = \&foo. Thus the need to create a lot of identical subroutines
78 |  |  |  |  | # Otherwise we could have aliased them to export().
79 |  |  |  |  |
80 |  |  |  |  | sub export_to_level {
81 |  |  |  |  | goto &{as_heavy()};
82 |  |  |  |  | }
83 |  |  |  |  |
84 |  |  |  |  | sub export_tags {
85 |  |  |  |  | goto &{as_heavy()};
86 |  |  |  |  | }
87 |  |  |  |  |
88 |  |  |  |  | sub export_ok_tags {
89 |  |  |  |  | goto &{as_heavy()};
90 |  |  |  |  | }
91 |  |  |  |  |
92 |  |  |  |  | sub require_version {
93 |  |  |  |  | goto &{as_heavy()};
94 |  |  |  |  | }
95 |  |  |  |  |
96 | 1 | 5µs |  |  | 1;
97 |  |  |  |  | __END__
|  |  |  |  | # spent 4µs within Exporter::CORE:match which was called: # once (4µs+0s) by Exporter::import at line 57 sub Exporter::CORE:match; # opcode
|  |  |  |  | # spent 3µs within Exporter::CORE:subst which was called: # once (3µs+0s) by Exporter::import at line 49 sub Exporter::CORE:subst; # opcode