Profile of Exporter/Heavy.pm

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For t/app_dpath.t
Run on Tue Jun 5 15:25:28 2012
Reported on Tue Jun 5 15:26:00 2012

Filename | /home/ss5/perl5/perlbrew/perls/perl-5.14.1/lib/5.14.1/Exporter/Heavy.pm
Statements | Executed 440 statements in 12.2ms

Subroutines
Calls | P | F | Exclusive Time | Inclusive Time | Subroutine
--- | --- | --- | --- | --- | ---
7 | 1 | 1 | 5.32ms | 5.93ms | Exporter::Heavy::::heavy_exportExporter::Heavy::heavy_export
184 | 3 | 1 | 595µs | 595µs | Exporter::Heavy::::CORE:substExporter::Heavy::CORE:subst (opcode)
2 | 1 | 1 | 110µs | 1.27ms | Exporter::Heavy::::heavy_export_to_levelExporter::Heavy::heavy_export_to_level
1 | 1 | 1 | 65µs | 81µs | Exporter::Heavy::::BEGIN@3Exporter::Heavy::BEGIN@3
1 | 1 | 1 | 58µs | 112µs | Exporter::Heavy::::BEGIN@197Exporter::Heavy::BEGIN@197
1 | 1 | 1 | 26µs | 77µs | Exporter::Heavy::::BEGIN@4Exporter::Heavy::BEGIN@4
4 | 2 | 1 | 14µs | 14µs | Exporter::Heavy::::CORE:matchExporter::Heavy::CORE:match (opcode)
0 | 0 | 0 | 0s | 0s | Exporter::Heavy::::__ANON__[:52]Exporter::Heavy::__ANON__[:52]
0 | 0 | 0 | 0s | 0s | Exporter::Heavy::::__ANON__[:58]Exporter::Heavy::__ANON__[:58]
0 | 0 | 0 | 0s | 0s | Exporter::Heavy::::_push_tagsExporter::Heavy::_push_tags
0 | 0 | 0 | 0s | 0s | Exporter::Heavy::::_rebuild_cacheExporter::Heavy::_rebuild_cache
0 | 0 | 0 | 0s | 0s | Exporter::Heavy::::heavy_export_ok_tagsExporter::Heavy::heavy_export_ok_tags
0 | 0 | 0 | 0s | 0s | Exporter::Heavy::::heavy_export_tagsExporter::Heavy::heavy_export_tags
0 | 0 | 0 | 0s | 0s | Exporter::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
--- | --- | --- | --- | --- | ---
1 |  |  |  |  | package Exporter::Heavy;
2 |  |  |  |  |
3 | 2 | 135µs | 2 | 98µs | # spent 81µs (65+17) within Exporter::Heavy::BEGIN@3 which was called: # once (65µs+17µs) by Exporter::as_heavy at line 3 use strict; # spent 81µs making 1 call to Exporter::Heavy::BEGIN@3 # spent 17µs making 1 call to strict::import
4 | 2 | 4.22ms | 2 | 129µs | # spent 77µs (26+52) within Exporter::Heavy::BEGIN@4 which was called: # once (26µs+52µs) by Exporter::as_heavy at line 4 no strict 'refs'; # spent 77µs making 1 call to Exporter::Heavy::BEGIN@4 # spent 52µs making 1 call to strict::unimport
5 |  |  |  |  |
6 |  |  |  |  | # On one line so MakeMaker will see it.
7 | 2 | 7µs |  |  | require Exporter; our $VERSION = $Exporter::VERSION;
8 |  |  |  |  |
9 |  |  |  |  | =head1 NAME
10 |  |  |  |  |
11 |  |  |  |  | Exporter::Heavy - Exporter guts
12 |  |  |  |  |
13 |  |  |  |  | =head1 SYNOPSIS
14 |  |  |  |  |
15 |  |  |  |  | (internal use only)
16 |  |  |  |  |
17 |  |  |  |  | =head1 DESCRIPTION
18 |  |  |  |  |
19 |  |  |  |  | No user-serviceable parts inside.
20 |  |  |  |  |
21 |  |  |  |  | =cut
22 |  |  |  |  |
23 |  |  |  |  | #
24 |  |  |  |  | # We go to a lot of trouble not to 'require Carp' at file scope,
25 |  |  |  |  | # because Carp requires Exporter, and something has to give.
26 |  |  |  |  | #
27 |  |  |  |  |
28 |  |  |  |  | sub _rebuild_cache {
29 |  |  |  |  | my ($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 5.93ms (5.32+609µs) within Exporter::Heavy::heavy_export which was called 7 times, avg 847µs/call: # 7 times (5.32ms+609µs) by Exporter::Heavy::heavy_export_to_level or Exporter::import or FileHandle::import at line 25 of Exporter.pm, avg 847µs/call sub heavy_export {
40 |  |  |  |  |
41 |  |  |  |  | # First make import warnings look like they're coming from the "use".
42 |  |  |  |  | local $SIG{__WARN__} = sub {
43 |  |  |  |  | my $text = shift;
44 |  |  |  |  | if ($text =~ s/ at \S*Exporter\S*.pm line \d+.*\n//) {
45 |  |  |  |  | require Carp;
46 |  |  |  |  | local $Carp::CarpLevel = 1; # ignore package calling us too.
47 |  |  |  |  | Carp::carp($text);
48 |  |  |  |  | }
49 |  |  |  |  | else {
50 |  |  |  |  | warn $text;
51 |  |  |  |  | }
52 | 421 | 5.97ms |  |  | };
53 |  |  |  |  | local $SIG{__DIE__} = sub {
54 |  |  |  |  | require Carp;
55 |  |  |  |  | local $Carp::CarpLevel = 1; # ignore package calling us too.
56 |  |  |  |  | Carp::croak("$_[0]Illegal null symbol in \@${1}::EXPORT")
57 |  |  |  |  | if $_[0] =~ /^Unable to create sub named "(.*?)::"/;
58 |  |  |  |  | };
59 |  |  |  |  |
60 |  |  |  |  | my($pkg, $callpkg, @imports) = @_;
61 |  |  |  |  | my($type, $sym, $cache_is_current, $oops);
62 |  |  |  |  | my($exports, $export_cache) = (\@{"${pkg}::EXPORT"},
63 |  |  |  |  | $Exporter::Cache{$pkg} ||= {});
64 |  |  |  |  |
65 |  |  |  |  | if (@imports) {
66 |  |  |  |  | if (!%$export_cache) {
67 |  |  |  |  | _rebuild_cache ($pkg, $exports, $export_cache);
68 |  |  |  |  | $cache_is_current = 1;
69 |  |  |  |  | }
70 |  |  |  |  |
71 |  |  | 2 | 10µs | if (grep m{^[/!:]}, @imports) { # spent 10µs making 2 calls to Exporter::Heavy::CORE:match, avg 5µs/call
72 |  |  |  |  | my $tagsref = \%{"${pkg}::EXPORT_TAGS"};
73 |  |  |  |  | my $tagdata;
74 |  |  |  |  | my %imports;
75 |  |  |  |  | my($remove, $spec, @names, @allexports);
76 |  |  |  |  | # negated first item implies starting with default set:
77 |  |  | 2 | 4µs | unshift @imports, ':DEFAULT' if $imports[0] =~ m/^!/; # spent 4µs making 2 calls to Exporter::Heavy::CORE:match, avg 2µs/call
78 |  |  |  |  | foreach $spec (@imports){
79 |  |  | 2 | 3µs | $remove = $spec =~ s/^!//; # spent 3µs making 2 calls to Exporter::Heavy::CORE:subst, avg 2µs/call
80 |  |  |  |  |
81 |  |  | 2 | 8µs | if ($spec =~ s/^://){ # spent 8µs making 2 calls to Exporter::Heavy::CORE:subst, avg 4µs/call
82 |  |  |  |  | if ($spec eq 'DEFAULT'){
83 |  |  |  |  | @names = @$exports;
84 |  |  |  |  | }
85 |  |  |  |  | elsif ($tagdata = $tagsref->{$spec}) {
86 |  |  |  |  | @names = @$tagdata;
87 |  |  |  |  | }
88 |  |  |  |  | else {
89 |  |  |  |  | warn qq["$spec" is not defined in %${pkg}::EXPORT_TAGS];
90 |  |  |  |  | ++$oops;
91 |  |  |  |  | next;
92 |  |  |  |  | }
93 |  |  |  |  | }
94 |  |  |  |  | elsif ($spec =~ m:^/(.*)/$:){
95 |  |  |  |  | my $patn = $1;
96 |  |  |  |  | @allexports = keys %$export_cache unless @allexports; # only do keys once
97 |  |  |  |  | @names = grep(/$patn/, @allexports); # not anchored by default
98 |  |  |  |  | }
99 |  |  |  |  | else {
100 |  |  |  |  | @names = ($spec); # is a normal symbol name
101 |  |  |  |  | }
102 |  |  |  |  |
103 |  |  |  |  | warn "Import ".($remove ? "del":"add").": @names "
104 |  |  |  |  | if $Exporter::Verbose;
105 |  |  |  |  |
106 |  |  |  |  | if ($remove) {
107 |  |  |  |  | foreach $sym (@names) { delete $imports{$sym} }
108 |  |  |  |  | }
109 |  |  |  |  | else {
110 |  |  |  |  | @imports{@names} = (1) x @names;
111 |  |  |  |  | }
112 |  |  |  |  | }
113 |  |  |  |  | @imports = keys %imports;
114 |  |  |  |  | }
115 |  |  |  |  |
116 |  |  |  |  | my @carp;
117 |  |  |  |  | foreach $sym (@imports) {
118 |  |  |  |  | if (!$export_cache->{$sym}) {
119 |  |  |  |  | if ($sym =~ m/^\d/) {
120 |  |  |  |  | $pkg->VERSION($sym); # inherit from UNIVERSAL
121 |  |  |  |  | # If the version number was the only thing specified
122 |  |  |  |  | # then we should act as if nothing was specified:
123 |  |  |  |  | if (@imports == 1) {
124 |  |  |  |  | @imports = @$exports;
125 |  |  |  |  | last;
126 |  |  |  |  | }
127 |  |  |  |  | # We need a way to emulate 'use Foo ()' but still
128 |  |  |  |  | # allow an easy version check: "use Foo 1.23, ''";
129 |  |  |  |  | if (@imports == 2 and !$imports[1]) {
130 |  |  |  |  | @imports = ();
131 |  |  |  |  | last;
132 |  |  |  |  | }
133 |  |  |  |  | } elsif ($sym !~ s/^&// || !$export_cache->{$sym}) {
134 |  |  |  |  | # Last chance - see if they've updated EXPORT_OK since we
135 |  |  |  |  | # cached it.
136 |  |  |  |  |
137 |  |  |  |  | unless ($cache_is_current) {
138 |  |  |  |  | %$export_cache = ();
139 |  |  |  |  | _rebuild_cache ($pkg, $exports, $export_cache);
140 |  |  |  |  | $cache_is_current = 1;
141 |  |  |  |  | }
142 |  |  |  |  |
143 |  |  |  |  | if (!$export_cache->{$sym}) {
144 |  |  |  |  | # accumulate the non-exports
145 |  |  |  |  | push @carp,
146 |  |  |  |  | qq["$sym" is not exported by the $pkg module\n];
147 |  |  |  |  | $oops++;
148 |  |  |  |  | }
149 |  |  |  |  | }
150 |  |  |  |  | }
151 |  |  |  |  | }
152 |  |  |  |  | if ($oops) {
153 |  |  |  |  | require Carp;
154 |  |  |  |  | Carp::croak("@{carp}Can't continue after import errors");
155 |  |  |  |  | }
156 |  |  |  |  | }
157 |  |  |  |  | else {
158 |  |  |  |  | @imports = @$exports;
159 |  |  |  |  | }
160 |  |  |  |  |
161 |  |  |  |  | my($fail, $fail_cache) = (\@{"${pkg}::EXPORT_FAIL"},
162 |  |  |  |  | $Exporter::FailCache{$pkg} ||= {});
163 |  |  |  |  |
164 |  |  |  |  | if (@$fail) {
165 |  |  |  |  | if (!%$fail_cache) {
166 |  |  |  |  | # Build cache of symbols. Optimise the lookup by adding
167 |  |  |  |  | # barewords twice... both with and without a leading &.
168 |  |  |  |  | # (Technique could be applied to $export_cache at cost of memory)
169 |  |  |  |  | my @expanded = map { /^\w/ ? ($_, '&'.$_) : $_ } @$fail;
170 |  |  |  |  | warn "${pkg}::EXPORT_FAIL cached: @expanded" if $Exporter::Verbose;
171 |  |  |  |  | @{$fail_cache}{@expanded} = (1) x @expanded;
172 |  |  |  |  | }
173 |  |  |  |  | my @failed;
174 |  |  |  |  | foreach $sym (@imports) { push(@failed, $sym) if $fail_cache->{$sym} }
175 |  |  |  |  | if (@failed) {
176 |  |  |  |  | @failed = $pkg->export_fail(@failed);
177 |  |  |  |  | foreach $sym (@failed) {
178 |  |  |  |  | require Carp;
179 |  |  |  |  | Carp::carp(qq["$sym" is not implemented by the $pkg module ],
180 |  |  |  |  | "on this architecture");
181 |  |  |  |  | }
182 |  |  |  |  | if (@failed) {
183 |  |  |  |  | require Carp;
184 |  |  |  |  | Carp::croak("Can't continue after import errors");
185 |  |  |  |  | }
186 |  |  |  |  | }
187 |  |  |  |  | }
188 |  |  |  |  |
189 |  |  |  |  | warn "Importing into $callpkg from $pkg: ",
190 |  |  |  |  | join(", ",sort @imports) if $Exporter::Verbose;
191 |  |  |  |  |
192 |  |  |  |  | foreach $sym (@imports) {
193 |  |  |  |  | # shortcut for the common case of no type character
194 |  |  | 180 | 585µs | (*{"${callpkg}::$sym"} = \&{"${pkg}::$sym"}, next) # spent 585µs making 180 calls to Exporter::Heavy::CORE:subst, avg 3µs/call
195 |  |  |  |  | unless $sym =~ s/^(\W)//;
196 |  |  |  |  | $type = $1;
197 | 2 | 1.78ms | 2 | 165µs | # spent 112µs (58+53) within Exporter::Heavy::BEGIN@197 which was called: # once (58µs+53µs) by Exporter::as_heavy at line 197 no warnings 'once'; # spent 112µs making 1 call to Exporter::Heavy::BEGIN@197 # spent 53µs making 1 call to warnings::unimport
198 |  |  |  |  | *{"${callpkg}::$sym"} =
199 |  |  |  |  | $type eq '&' ? \&{"${pkg}::$sym"} :
200 |  |  |  |  | $type eq '$' ? \${"${pkg}::$sym"} :
201 |  |  |  |  | $type eq '@' ? \@{"${pkg}::$sym"} :
202 |  |  |  |  | $type eq '%' ? \%{"${pkg}::$sym"} :
203 |  |  |  |  | $type eq '*' ? *{"${pkg}::$sym"} :
204 |  |  |  |  | do { require Carp; Carp::croak("Can't export symbol: $type$sym") };
205 |  |  |  |  | }
206 |  |  |  |  | }
207 |  |  |  |  |
208 |  |  |  |  | sub heavy_export_to_level
209 |  |  |  |  | # spent 1.27ms (110µs+1.16) within Exporter::Heavy::heavy_export_to_level which was called 2 times, avg 636µs/call: # 2 times (110µs+1.16ms) by JSON::import or Test::Builder::Module::import at line 81 of Exporter.pm, avg 636µs/call {
210 | 10 | 87µs |  |  | my $pkg = shift;
211 |  |  |  |  | my $level = shift;
212 |  |  |  |  | (undef) = shift; # XXX redundant arg
213 |  |  |  |  | my $callpkg = caller($level);
214 |  |  | 2 | 96µs | $pkg->export($callpkg, @_); # spent 96µs making 2 calls to Exporter::export, avg 48µs/call
215 |  |  |  |  | }
216 |  |  |  |  |
217 |  |  |  |  | # Utility functions
218 |  |  |  |  |
219 |  |  |  |  | sub _push_tags {
220 |  |  |  |  | my($pkg, $var, $syms) = @_;
221 |  |  |  |  | my @nontag = ();
222 |  |  |  |  | my $export_tags = \%{"${pkg}::EXPORT_TAGS"};
223 |  |  |  |  | push(@{"${pkg}::$var"},
224 |  |  |  |  | map { $export_tags->{$_} ? @{$export_tags->{$_}}
225 |  |  |  |  | : scalar(push(@nontag,$_),$_) }
226 |  |  |  |  | (@$syms) ? @$syms : keys %$export_tags);
227 |  |  |  |  | if (@nontag and $^W) {
228 |  |  |  |  | # This may change to a die one day
229 |  |  |  |  | require Carp;
230 |  |  |  |  | Carp::carp(join(", ", @nontag)." are not tags of $pkg");
231 |  |  |  |  | }
232 |  |  |  |  | }
233 |  |  |  |  |
234 |  |  |  |  | sub heavy_require_version {
235 |  |  |  |  | my($self, $wanted) = @_;
236 |  |  |  |  | my $pkg = ref $self || $self;
237 |  |  |  |  | return ${pkg}->VERSION($wanted);
238 |  |  |  |  | }
239 |  |  |  |  |
240 |  |  |  |  | sub heavy_export_tags {
241 |  |  |  |  | _push_tags((caller)[0], "EXPORT", \@_);
242 |  |  |  |  | }
243 |  |  |  |  |
244 |  |  |  |  | sub heavy_export_ok_tags {
245 |  |  |  |  | _push_tags((caller)[0], "EXPORT_OK", \@_);
246 |  |  |  |  | }
247 |  |  |  |  |
248 | 1 | 14µs |  |  | 1;
|  |  |  |  | # spent 14µs within Exporter::Heavy::CORE:match which was called 4 times, avg 3µs/call: # 2 times (10µs+0s) by Exporter::Heavy::heavy_export at line 71, avg 5µs/call # 2 times (4µs+0s) by Exporter::Heavy::heavy_export at line 77, avg 2µs/call sub Exporter::Heavy::CORE:match; # opcode
|  |  |  |  | # spent 595µs within Exporter::Heavy::CORE:subst which was called 184 times, avg 3µs/call: # 180 times (585µs+0s) by Exporter::Heavy::heavy_export at line 194, avg 3µs/call # 2 times (8µs+0s) by Exporter::Heavy::heavy_export at line 81, avg 4µs/call # 2 times (3µs+0s) by Exporter::Heavy::heavy_export at line 79, avg 2µs/call sub Exporter::Heavy::CORE:subst; # opcode