← Index
NYTProf Performance Profile   « line view »
For Makefile.PL
  Run on Sun Mar 1 16:04:44 2015
Reported on Sun Mar 1 16:09:02 2015

FilenameC:/tmp64ng/perl/lib/Exporter/Heavy.pm
StatementsExecuted 102 statements in 15.6ms
Subroutines
Calls P F Exclusive
Time		 Inclusive
Time		 Subroutine
1110s0sExporter::Heavy::::BEGIN@202Exporter::Heavy::BEGIN@202
1110s0sExporter::Heavy::::BEGIN@3Exporter::Heavy::BEGIN@3
1110s0sExporter::Heavy::::BEGIN@4Exporter::Heavy::BEGIN@4
3110s0sExporter::Heavy::::CORE:matchExporter::Heavy::CORE:match (opcode)
12110s0sExporter::Heavy::::CORE:substExporter::Heavy::CORE:subst (opcode)
0000s0sExporter::Heavy::::__ANON__[:57]Exporter::Heavy::__ANON__[:57]
0000s0sExporter::Heavy::::__ANON__[:63]Exporter::Heavy::__ANON__[:63]
0000s0sExporter::Heavy::::_push_tagsExporter::Heavy::_push_tags
0000s0sExporter::Heavy::::_rebuild_cacheExporter::Heavy::_rebuild_cache
5110s0sExporter::Heavy::::heavy_exportExporter::Heavy::heavy_export
0000s0sExporter::Heavy::::heavy_export_ok_tagsExporter::Heavy::heavy_export_ok_tags
0000s0sExporter::Heavy::::heavy_export_tagsExporter::Heavy::heavy_export_tags
0000s0sExporter::Heavy::::heavy_export_to_levelExporter::Heavy::heavy_export_to_level
0000s0sExporter::Heavy::::heavy_require_versionExporter::Heavy::heavy_require_version
Call graph for these subroutines as a Graphviz dot language file.
Line State
ments		 Time
on line		 Calls Time
in subs		 Code
1package Exporter::Heavy;
2
320s20s
# spent 0s within Exporter::Heavy::BEGIN@3 which was called: # once (0s+0s) by Exporter::as_heavy at line 3
use strict;
# spent 0s making 1 call to Exporter::Heavy::BEGIN@3 # spent 0s making 1 call to strict::import
420s20s
# spent 0s within Exporter::Heavy::BEGIN@4 which was called: # once (0s+0s) by Exporter::as_heavy at line 4
no strict 'refs';
# spent 0s making 1 call to Exporter::Heavy::BEGIN@4 # spent 0s making 1 call to strict::unimport
5
6# On one line so MakeMaker will see it.
720srequire Exporter; our $VERSION = $Exporter::VERSION;
8
9=head1 NAME
10
11Exporter::Heavy - Exporter guts
12
13=head1 SYNOPSIS
14
15(internal use only)
16
17=head1 DESCRIPTION
18
19No user-serviceable parts inside.
20
21=cut
22
23#
24# We go to a lot of trouble not to 'require Carp' at file scope,
25# because Carp requires Exporter, and something has to give.
26#
27
28sub _rebuild_cache {
29 my ($pkg, $exports, $cache) = @_;
30 s/^&// foreach @$exports;
31 @{$cache}{@$exports} = (1) x @$exports;
32 my $ok = \@{"${pkg}::EXPORT_OK"};
33 if (@$ok) {
34 s/^&// foreach @$ok;
35 @{$cache}{@$ok} = (1) x @$ok;
36 }
37}
38
39
# spent 0s within Exporter::Heavy::heavy_export which was called 5 times, avg 0s/call: # 5 times (0s+0s) by Exporter::import at line 25 of Exporter.pm, avg 0s/call
sub heavy_export {
40
41 # Save the old __WARN__ handler in case it was defined
4250s my $oldwarn = $SIG{__WARN__};
43
44 # First make import warnings look like they're coming from the "use".
45 local $SIG{__WARN__} = sub {
46 # restore it back so proper stacking occurs
47 local $SIG{__WARN__} = $oldwarn;
48 my $text = shift;
49 if ($text =~ s/ at \S*Exporter\S*.pm line \d+.*\n//) {
50 require Carp;
51 local $Carp::CarpLevel = 1; # ignore package calling us too.
52 Carp::carp($text);
53 }
54 else {
55 warn $text;
56 }
5750s };
58 local $SIG{__DIE__} = sub {
59 require Carp;
60 local $Carp::CarpLevel = 1; # ignore package calling us too.
61 Carp::croak("$_[0]Illegal null symbol in \@${1}::EXPORT")
62 if $_[0] =~ /^Unable to create sub named "(.*?)::"/;
6350s };
64
6550s my($pkg, $callpkg, @imports) = @_;
6650s my($type, $sym, $cache_is_current, $oops);
6750s my($exports, $export_cache) = (\@{"${pkg}::EXPORT"},
68 $Exporter::Cache{$pkg} ||= {});
69
7050s if (@imports) {
7120s if (!%$export_cache) {
72 _rebuild_cache ($pkg, $exports, $export_cache);
73 $cache_is_current = 1;
74 }
75
7620s30s if (grep m{^[/!:]}, @imports) {
# spent 0s making 3 calls to Exporter::Heavy::CORE:match, avg 0s/call
77 my $tagsref = \%{"${pkg}::EXPORT_TAGS"};
78 my $tagdata;
79 my %imports;
80 my($remove, $spec, @names, @allexports);
81 # negated first item implies starting with default set:
82 unshift @imports, ':DEFAULT' if $imports[0] =~ m/^!/;
83 foreach $spec (@imports){
84 $remove = $spec =~ s/^!//;
85
86 if ($spec =~ s/^://){
87 if ($spec eq 'DEFAULT'){
88 @names = @$exports;
89 }
90 elsif ($tagdata = $tagsref->{$spec}) {
91 @names = @$tagdata;
92 }
93 else {
94 warn qq["$spec" is not defined in %${pkg}::EXPORT_TAGS];
95 ++$oops;
96 next;
97 }
98 }
99 elsif ($spec =~ m:^/(.*)/$:){
100 my $patn = $1;
101 @allexports = keys %$export_cache unless @allexports; # only do keys once
102 @names = grep(/$patn/, @allexports); # not anchored by default
103 }
104 else {
105 @names = ($spec); # is a normal symbol name
106 }
107
108 warn "Import ".($remove ? "del":"add").": @names "
109 if $Exporter::Verbose;
110
111 if ($remove) {
112 foreach $sym (@names) { delete $imports{$sym} }
113 }
114 else {
115 @imports{@names} = (1) x @names;
116 }
117 }
118 @imports = keys %imports;
119 }
120
12120s my @carp;
12220s foreach $sym (@imports) {
12330s if (!$export_cache->{$sym}) {
124 if ($sym =~ m/^\d/) {
125 $pkg->VERSION($sym); # inherit from UNIVERSAL
126 # If the version number was the only thing specified
127 # then we should act as if nothing was specified:
128 if (@imports == 1) {
129 @imports = @$exports;
130 last;
131 }
132 # We need a way to emulate 'use Foo ()' but still
133 # allow an easy version check: "use Foo 1.23, ''";
134 if (@imports == 2 and !$imports[1]) {
135 @imports = ();
136 last;
137 }
138 } elsif ($sym !~ s/^&// || !$export_cache->{$sym}) {
139 # Last chance - see if they've updated EXPORT_OK since we
140 # cached it.
141
142 unless ($cache_is_current) {
143 %$export_cache = ();
144 _rebuild_cache ($pkg, $exports, $export_cache);
145 $cache_is_current = 1;
146 }
147
148 if (!$export_cache->{$sym}) {
149 # accumulate the non-exports
150 push @carp,
151 qq["$sym" is not exported by the $pkg module\n];
152 $oops++;
153 }
154 }
155 }
156 }
15720s if ($oops) {
158 require Carp;
159 Carp::croak("@{carp}Can't continue after import errors");
160 }
161 }
162 else {
16330s @imports = @$exports;
164 }
165
16650s my($fail, $fail_cache) = (\@{"${pkg}::EXPORT_FAIL"},
167 $Exporter::FailCache{$pkg} ||= {});
168
16950s if (@$fail) {
170 if (!%$fail_cache) {
171 # Build cache of symbols. Optimise the lookup by adding
172 # barewords twice... both with and without a leading &.
173 # (Technique could be applied to $export_cache at cost of memory)
174 my @expanded = map { /^\w/ ? ($_, '&'.$_) : $_ } @$fail;
175 warn "${pkg}::EXPORT_FAIL cached: @expanded" if $Exporter::Verbose;
176 @{$fail_cache}{@expanded} = (1) x @expanded;
177 }
178 my @failed;
179 foreach $sym (@imports) { push(@failed, $sym) if $fail_cache->{$sym} }
180 if (@failed) {
181 @failed = $pkg->export_fail(@failed);
182 foreach $sym (@failed) {
183 require Carp;
184 Carp::carp(qq["$sym" is not implemented by the $pkg module ],
185 "on this architecture");
186 }
187 if (@failed) {
188 require Carp;
189 Carp::croak("Can't continue after import errors");
190 }
191 }
192 }
193
19450s warn "Importing into $callpkg from $pkg: ",
195 join(", ",sort @imports) if $Exporter::Verbose;
196
19750s foreach $sym (@imports) {
198 # shortcut for the common case of no type character
199120s120s (*{"${callpkg}::$sym"} = \&{"${pkg}::$sym"}, next)
# spent 0s making 12 calls to Exporter::Heavy::CORE:subst, avg 0s/call
200 unless $sym =~ s/^(\W)//;
20150s $type = $1;
202215.6ms20s
# spent 0s within Exporter::Heavy::BEGIN@202 which was called: # once (0s+0s) by Exporter::as_heavy at line 202
no warnings 'once';
# spent 0s making 1 call to Exporter::Heavy::BEGIN@202 # spent 0s making 1 call to warnings::unimport
203 *{"${callpkg}::$sym"} =
204 $type eq '&' ? \&{"${pkg}::$sym"} :
205 $type eq '$' ? \${"${pkg}::$sym"} :
206 $type eq '@' ? \@{"${pkg}::$sym"} :
207 $type eq '%' ? \%{"${pkg}::$sym"} :
208 $type eq '*' ? *{"${pkg}::$sym"} :
20950s do { require Carp; Carp::croak("Can't export symbol: $type$sym") };
210 }
211}
212
213sub heavy_export_to_level
214{
215 my $pkg = shift;
216 my $level = shift;
217 (undef) = shift; # XXX redundant arg
218 my $callpkg = caller($level);
219 $pkg->export($callpkg, @_);
220}
221
222# Utility functions
223
224sub _push_tags {
225 my($pkg, $var, $syms) = @_;
226 my @nontag = ();
227 my $export_tags = \%{"${pkg}::EXPORT_TAGS"};
228 push(@{"${pkg}::$var"},
229 map { $export_tags->{$_} ? @{$export_tags->{$_}}
230 : scalar(push(@nontag,$_),$_) }
231 (@$syms) ? @$syms : keys %$export_tags);
232 if (@nontag and $^W) {
233 # This may change to a die one day
234 require Carp;
235 Carp::carp(join(", ", @nontag)." are not tags of $pkg");
236 }
237}
238
239sub heavy_require_version {
240 my($self, $wanted) = @_;
241 my $pkg = ref $self || $self;
242 return ${pkg}->VERSION($wanted);
243}
244
245sub heavy_export_tags {
246 _push_tags((caller)[0], "EXPORT", \@_);
247}
248
249sub heavy_export_ok_tags {
250 _push_tags((caller)[0], "EXPORT_OK", \@_);
251}
252
25310s1;
 
# spent 0s within Exporter::Heavy::CORE:match which was called 3 times, avg 0s/call: # 3 times (0s+0s) by Exporter::Heavy::heavy_export at line 76, avg 0s/call
sub Exporter::Heavy::CORE:match; # opcode
# spent 0s within Exporter::Heavy::CORE:subst which was called 12 times, avg 0s/call: # 12 times (0s+0s) by Exporter::Heavy::heavy_export at line 199, avg 0s/call
sub Exporter::Heavy::CORE:subst; # opcode
Report produced by the NYTProf 5.07 Perl profiler, developed by Tim Bunce and Adam Kaplan.