Profile of Exporter/Heavy.pm

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For script/ponapi
Run on Wed Feb 10 15:51:26 2016
Reported on Thu Feb 11 09:43:09 2016

Filename | /usr/share/perl/5.18/Exporter/Heavy.pm
Statements | Executed 1090 statements in 13.4ms

Subroutines
Calls | P | F | Exclusive Time | Inclusive Time | Subroutine
--- | --- | --- | --- | --- | ---
18 | 1 | 1 | 7.76ms | 12.6ms | Exporter::Heavy::::heavy_exportExporter::Heavy::heavy_export
5 | 2 | 1 | 4.11ms | 4.19ms | Exporter::Heavy::::_rebuild_cacheExporter::Heavy::_rebuild_cache
1694 | 6 | 1 | 260µs | 260µs | Exporter::Heavy::::CORE:substExporter::Heavy::CORE:subst (opcode)
2 | 2 | 1 | 43µs | 43µs | Exporter::Heavy::::_push_tagsExporter::Heavy::_push_tags
3 | 1 | 1 | 28µs | 269µs | Exporter::Heavy::::heavy_export_to_levelExporter::Heavy::heavy_export_to_level
18 | 4 | 1 | 12µs | 12µs | Exporter::Heavy::::CORE:matchExporter::Heavy::CORE:match (opcode)
3 | 1 | 1 | 12µs | 13µs | Exporter::Heavy::::__ANON__[:44]Exporter::Heavy::__ANON__[:44]
1 | 1 | 1 | 9µs | 44µs | Exporter::Heavy::::BEGIN@183Exporter::Heavy::BEGIN@183
1 | 1 | 1 | 9µs | 18µs | Exporter::Heavy::::BEGIN@3Exporter::Heavy::BEGIN@3
1 | 1 | 1 | 6µs | 34µs | Exporter::Heavy::::heavy_export_ok_tagsExporter::Heavy::heavy_export_ok_tags
1 | 1 | 1 | 5µs | 12µs | Exporter::Heavy::::BEGIN@4Exporter::Heavy::BEGIN@4
1 | 1 | 1 | 5µs | 20µs | Exporter::Heavy::::heavy_export_tagsExporter::Heavy::heavy_export_tags
0 | 0 | 0 | 0s | 0s | Exporter::Heavy::::__ANON__[:38]Exporter::Heavy::__ANON__[:38]
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 | 21µs | 2 | 28µs | # spent 18µs (9+9) within Exporter::Heavy::BEGIN@3 which was called: # once (9µs+9µs) by Exporter::as_heavy at line 3 use strict; # spent 18µs making 1 call to Exporter::Heavy::BEGIN@3 # spent 9µs making 1 call to strict::import
4 | 2 | 747µs | 2 | 18µs | # spent 12µs (5+7) within Exporter::Heavy::BEGIN@4 which was called: # once (5µs+7µs) by Exporter::as_heavy at line 4 no strict 'refs'; # spent 12µs making 1 call to Exporter::Heavy::BEGIN@4 # spent 7µs making 1 call to strict::unimport
5 |  |  |  |  |
6 |  |  |  |  | # On one line so MakeMaker will see it.
7 | 2 | 800ns |  |  | require Exporter; our $VERSION = $Exporter::VERSION;
8 |  |  |  |  |
9 |  |  |  |  | #
10 |  |  |  |  | # We go to a lot of trouble not to 'require Carp' at file scope,
11 |  |  |  |  | # because Carp requires Exporter, and something has to give.
12 |  |  |  |  | #
13 |  |  |  |  |
14 |  |  |  |  | # spent 4.19ms (4.11+84µs) within Exporter::Heavy::_rebuild_cache which was called 5 times, avg 838µs/call: # 3 times (4.03ms+80µs) by Exporter::Heavy::heavy_export at line 125, avg 1.37ms/call # 2 times (80µs+4µs) by Exporter::Heavy::heavy_export at line 53, avg 42µs/call sub _rebuild_cache {
15 | 5 | 2µs |  |  | my ($pkg, $exports, $cache) = @_;
16 | 5 | 10µs | 1 | 400ns | s/^&// foreach @$exports; # spent 400ns making 1 call to Exporter::Heavy::CORE:subst
17 | 5 | 8µs |  |  | @{$cache}{@$exports} = (1) x @$exports;
18 | 5 | 9µs |  |  | my $ok = \@{"${pkg}::EXPORT_OK"};
19 | 5 | 17µs |  |  | if (@$ok) {
20 | 4 | 4.00ms | 1037 | 83µs | s/^&// foreach @$ok; # spent 83µs making 1037 calls to Exporter::Heavy::CORE:subst, avg 80ns/call
21 | 4 | 157µs |  |  | @{$cache}{@$ok} = (1) x @$ok;
22 |  |  |  |  | }
23 |  |  |  |  | }
24 |  |  |  |  |
25 |  |  |  |  | # spent 12.6ms (7.76+4.84) within Exporter::Heavy::heavy_export which was called 18 times, avg 700µs/call: # 18 times (7.76ms+4.84ms) by Exporter::Heavy::heavy_export_to_level or Exporter::import or FileHandle::import or IO::Socket::import at line 25 of Exporter.pm, avg 700µs/call sub heavy_export {
26 |  |  |  |  |
27 |  |  |  |  | # First make import warnings look like they're coming from the "use".
28 |  |  |  |  | local $SIG{__WARN__} = sub {
29 |  |  |  |  | my $text = shift;
30 |  |  |  |  | if ($text =~ s/ at \S*Exporter\S*.pm line \d+.*\n//) {
31 |  |  |  |  | require Carp;
32 |  |  |  |  | local $Carp::CarpLevel = 1; # ignore package calling us too.
33 |  |  |  |  | Carp::carp($text);
34 |  |  |  |  | }
35 |  |  |  |  | else {
36 |  |  |  |  | warn $text;
37 |  |  |  |  | }
38 | 18 | 87µs |  |  | };
39 |  |  |  |  | # spent 13µs (12+1) within Exporter::Heavy::__ANON__[/usr/share/perl/5.18/Exporter/Heavy.pm:44] which was called 3 times, avg 4µs/call: # 3 times (12µs+1µs) by Carp::croak at line 100 of Carp.pm, avg 4µs/call local $SIG{__DIE__} = sub {
40 | 3 | 1µs |  |  | require Carp;
41 | 3 | 1µs |  |  | local $Carp::CarpLevel = 1; # ignore package calling us too.
42 | 3 | 12µs | 3 | 1µs | Carp::croak("$_[0]Illegal null symbol in \@${1}::EXPORT") # spent 1µs making 3 calls to Exporter::Heavy::CORE:match, avg 400ns/call
43 |  |  |  |  | if $_[0] =~ /^Unable to create sub named "(.*?)::"/;
44 | 18 | 84µs |  |  | };
45 |  |  |  |  |
46 | 18 | 17µs |  |  | my($pkg, $callpkg, @imports) = @_;
47 | 18 | 4µs |  |  | my($type, $sym, $cache_is_current, $oops);
48 | 18 | 44µs |  |  | my($exports, $export_cache) = (\@{"${pkg}::EXPORT"},
49 |  |  |  |  | $Exporter::Cache{$pkg} ||= {});
50 |  |  |  |  |
51 | 18 | 10µs |  |  | if (@imports) {
52 | 9 | 15µs |  |  | if (!%$export_cache) {
53 | 2 | 3µs | 2 | 84µs | _rebuild_cache ($pkg, $exports, $export_cache); # spent 84µs making 2 calls to Exporter::Heavy::_rebuild_cache, avg 42µs/call
54 | 2 | 600ns |  |  | $cache_is_current = 1;
55 |  |  |  |  | }
56 |  |  |  |  |
57 | 9 | 40µs | 9 | 8µs | if (grep m{^[/!:]}, @imports) { # spent 8µs making 9 calls to Exporter::Heavy::CORE:match, avg 900ns/call
58 | 3 | 5µs |  |  | my $tagsref = \%{"${pkg}::EXPORT_TAGS"};
59 | 3 | 700ns |  |  | my $tagdata;
60 | 3 | 700ns |  |  | my %imports;
61 | 3 | 800ns |  |  | my($remove, $spec, @names, @allexports);
62 |  |  |  |  | # negated first item implies starting with default set:
63 | 3 | 10µs | 3 | 2µs | unshift @imports, ':DEFAULT' if $imports[0] =~ m/^!/; # spent 2µs making 3 calls to Exporter::Heavy::CORE:match, avg 600ns/call
64 | 3 | 5µs |  |  | foreach $spec (@imports){
65 | 3 | 10µs | 3 | 1µs | $remove = $spec =~ s/^!//; # spent 1µs making 3 calls to Exporter::Heavy::CORE:subst, avg 367ns/call
66 |  |  |  |  |
67 | 3 | 12µs | 3 | 4µs | if ($spec =~ s/^://){ # spent 4µs making 3 calls to Exporter::Heavy::CORE:subst, avg 1µs/call
68 | 3 | 12µs |  |  | if ($spec eq 'DEFAULT'){
69 |  |  |  |  | @names = @$exports;
70 |  |  |  |  | }
71 |  |  |  |  | elsif ($tagdata = $tagsref->{$spec}) {
72 |  |  |  |  | @names = @$tagdata;
73 |  |  |  |  | }
74 |  |  |  |  | else {
75 |  |  |  |  | warn qq["$spec" is not defined in %${pkg}::EXPORT_TAGS];
76 |  |  |  |  | ++$oops;
77 |  |  |  |  | next;
78 |  |  |  |  | }
79 |  |  |  |  | }
80 |  |  |  |  | elsif ($spec =~ m:^/(.*)/$:){
81 |  |  |  |  | my $patn = $1;
82 |  |  |  |  | @allexports = keys %$export_cache unless @allexports; # only do keys once
83 |  |  |  |  | @names = grep(/$patn/, @allexports); # not anchored by default
84 |  |  |  |  | }
85 |  |  |  |  | else {
86 |  |  |  |  | @names = ($spec); # is a normal symbol name
87 |  |  |  |  | }
88 |  |  |  |  |
89 | 3 | 800ns |  |  | warn "Import ".($remove ? "del":"add").": @names "
90 |  |  |  |  | if $Exporter::Verbose;
91 |  |  |  |  |
92 | 3 | 6µs |  |  | if ($remove) {
93 |  |  |  |  | foreach $sym (@names) { delete $imports{$sym} }
94 |  |  |  |  | }
95 |  |  |  |  | else {
96 | 3 | 17µs |  |  | @imports{@names} = (1) x @names;
97 |  |  |  |  | }
98 |  |  |  |  | }
99 | 3 | 16µs |  |  | @imports = keys %imports;
100 |  |  |  |  | }
101 |  |  |  |  |
102 | 9 | 2µs |  |  | my @carp;
103 | 9 | 6µs |  |  | foreach $sym (@imports) {
104 | 56 | 17µs |  |  | if (!$export_cache->{$sym}) {
105 | 3 | 13µs | 6 | 3µs | if ($sym =~ m/^\d/) { # spent 1µs making 3 calls to Exporter::Heavy::CORE:subst, avg 467ns/call # spent 1µs making 3 calls to Exporter::Heavy::CORE:match, avg 433ns/call
106 |  |  |  |  | $pkg->VERSION($sym); # inherit from UNIVERSAL
107 |  |  |  |  | # If the version number was the only thing specified
108 |  |  |  |  | # then we should act as if nothing was specified:
109 |  |  |  |  | if (@imports == 1) {
110 |  |  |  |  | @imports = @$exports;
111 |  |  |  |  | last;
112 |  |  |  |  | }
113 |  |  |  |  | # We need a way to emulate 'use Foo ()' but still
114 |  |  |  |  | # allow an easy version check: "use Foo 1.23, ''";
115 |  |  |  |  | if (@imports == 2 and !$imports[1]) {
116 |  |  |  |  | @imports = ();
117 |  |  |  |  | last;
118 |  |  |  |  | }
119 |  |  |  |  | } elsif ($sym !~ s/^&// || !$export_cache->{$sym}) {
120 |  |  |  |  | # Last chance - see if they've updated EXPORT_OK since we
121 |  |  |  |  | # cached it.
122 |  |  |  |  |
123 | 3 | 600ns |  |  | unless ($cache_is_current) {
124 | 3 | 33µs |  |  | %$export_cache = ();
125 | 3 | 14µs | 3 | 4.11ms | _rebuild_cache ($pkg, $exports, $export_cache); # spent 4.11ms making 3 calls to Exporter::Heavy::_rebuild_cache, avg 1.37ms/call
126 | 3 | 800ns |  |  | $cache_is_current = 1;
127 |  |  |  |  | }
128 |  |  |  |  |
129 | 3 | 1µs |  |  | if (!$export_cache->{$sym}) {
130 |  |  |  |  | # accumulate the non-exports
131 | 3 | 5µs |  |  | push @carp,
132 |  |  |  |  | qq["$sym" is not exported by the $pkg module\n];
133 | 3 | 900ns |  |  | $oops++;
134 |  |  |  |  | }
135 |  |  |  |  | }
136 |  |  |  |  | }
137 |  |  |  |  | }
138 | 9 | 3µs |  |  | if ($oops) {
139 | 3 | 1µs |  |  | require Carp;
140 | 3 | 5µs | 3 | 465µs | Carp::croak("@{carp}Can't continue after import errors"); # spent 465µs making 3 calls to Carp::croak, avg 155µs/call
141 |  |  |  |  | }
142 |  |  |  |  | }
143 |  |  |  |  | else {
144 | 9 | 65µs |  |  | @imports = @$exports;
145 |  |  |  |  | }
146 |  |  |  |  |
147 | 15 | 48µs |  |  | my($fail, $fail_cache) = (\@{"${pkg}::EXPORT_FAIL"},
148 |  |  |  |  | $Exporter::FailCache{$pkg} ||= {});
149 |  |  |  |  |
150 | 15 | 8µs |  |  | if (@$fail) {
151 |  |  |  |  | if (!%$fail_cache) {
152 |  |  |  |  | # Build cache of symbols. Optimise the lookup by adding
153 |  |  |  |  | # barewords twice... both with and without a leading &.
154 |  |  |  |  | # (Technique could be applied to $export_cache at cost of memory)
155 |  |  |  |  | my @expanded = map { /^\w/ ? ($_, '&'.$_) : $_ } @$fail;
156 |  |  |  |  | warn "${pkg}::EXPORT_FAIL cached: @expanded" if $Exporter::Verbose;
157 |  |  |  |  | @{$fail_cache}{@expanded} = (1) x @expanded;
158 |  |  |  |  | }
159 |  |  |  |  | my @failed;
160 |  |  |  |  | foreach $sym (@imports) { push(@failed, $sym) if $fail_cache->{$sym} }
161 |  |  |  |  | if (@failed) {
162 |  |  |  |  | @failed = $pkg->export_fail(@failed);
163 |  |  |  |  | foreach $sym (@failed) {
164 |  |  |  |  | require Carp;
165 |  |  |  |  | Carp::carp(qq["$sym" is not implemented by the $pkg module ],
166 |  |  |  |  | "on this architecture");
167 |  |  |  |  | }
168 |  |  |  |  | if (@failed) {
169 |  |  |  |  | require Carp;
170 |  |  |  |  | Carp::croak("Can't continue after import errors");
171 |  |  |  |  | }
172 |  |  |  |  | }
173 |  |  |  |  | }
174 |  |  |  |  |
175 | 15 | 3µs |  |  | warn "Importing into $callpkg from $pkg: ",
176 |  |  |  |  | join(", ",sort @imports) if $Exporter::Verbose;
177 |  |  |  |  |
178 | 15 | 243µs |  |  | foreach $sym (@imports) {
179 |  |  |  |  | # shortcut for the common case of no type character
180 | 647 | 7.03ms | 647 | 170µs | (*{"${callpkg}::$sym"} = \&{"${pkg}::$sym"}, next) # spent 170µs making 647 calls to Exporter::Heavy::CORE:subst, avg 263ns/call
181 |  |  |  |  | unless $sym =~ s/^(\W)//;
182 | 7 | 8µs |  |  | $type = $1;
183 | 2 | 350µs | 2 | 78µs | # spent 44µs (9+35) within Exporter::Heavy::BEGIN@183 which was called: # once (9µs+35µs) by Exporter::as_heavy at line 183 no warnings 'once'; # spent 44µs making 1 call to Exporter::Heavy::BEGIN@183 # spent 35µs making 1 call to warnings::unimport
184 |  |  |  |  | *{"${callpkg}::$sym"} =
185 |  |  |  |  | $type eq '&' ? \&{"${pkg}::$sym"} :
186 |  |  |  |  | $type eq '$' ? \${"${pkg}::$sym"} :
187 |  |  |  |  | $type eq '@' ? \@{"${pkg}::$sym"} :
188 |  |  |  |  | $type eq '%' ? \%{"${pkg}::$sym"} :
189 |  |  |  |  | $type eq '*' ? *{"${pkg}::$sym"} :
190 | 7 | 35µs |  |  | do { require Carp; Carp::croak("Can't export symbol: $type$sym") };
191 |  |  |  |  | }
192 |  |  |  |  | }
193 |  |  |  |  |
194 |  |  |  |  | sub heavy_export_to_level
195 |  |  |  |  | # spent 269µs (28+241) within Exporter::Heavy::heavy_export_to_level which was called 3 times, avg 90µs/call: # 3 times (28µs+241µs) by Class::Struct::import or Time::HiRes::import at line 81 of Exporter.pm, avg 90µs/call {
196 | 3 | 1µs |  |  | my $pkg = shift;
197 | 3 | 700ns |  |  | my $level = shift;
198 | 3 | 1µs |  |  | (undef) = shift; # XXX redundant arg
199 | 3 | 2µs |  |  | my $callpkg = caller($level);
200 | 3 | 15µs | 3 | 29µs | $pkg->export($callpkg, @_); # spent 29µs making 3 calls to Exporter::export, avg 10µs/call
201 |  |  |  |  | }
202 |  |  |  |  |
203 |  |  |  |  | # Utility functions
204 |  |  |  |  |
205 |  |  |  |  | # spent 43µs within Exporter::Heavy::_push_tags which was called 2 times, avg 21µs/call: # once (28µs+0s) by Exporter::Heavy::heavy_export_ok_tags at line 231 # once (15µs+0s) by Exporter::Heavy::heavy_export_tags at line 227 sub _push_tags {
206 | 2 | 2µs |  |  | my($pkg, $var, $syms) = @_;
207 | 2 | 800ns |  |  | my @nontag = ();
208 | 2 | 3µs |  |  | my $export_tags = \%{"${pkg}::EXPORT_TAGS"};
209 |  |  |  |  | push(@{"${pkg}::$var"},
210 | 2 | 33µs |  |  | map { $export_tags->{$_} ? @{$export_tags->{$_}}
211 |  |  |  |  | : scalar(push(@nontag,$_),$_) }
212 |  |  |  |  | (@$syms) ? @$syms : keys %$export_tags);
213 | 2 | 7µs |  |  | if (@nontag and $^W) {
214 |  |  |  |  | # This may change to a die one day
215 |  |  |  |  | require Carp;
216 |  |  |  |  | Carp::carp(join(", ", @nontag)." are not tags of $pkg");
217 |  |  |  |  | }
218 |  |  |  |  | }
219 |  |  |  |  |
220 |  |  |  |  | sub heavy_require_version {
221 |  |  |  |  | my($self, $wanted) = @_;
222 |  |  |  |  | my $pkg = ref $self || $self;
223 |  |  |  |  | return ${pkg}->VERSION($wanted);
224 |  |  |  |  | }
225 |  |  |  |  |
226 |  |  |  |  | # spent 20µs (5+15) within Exporter::Heavy::heavy_export_tags which was called: # once (5µs+15µs) by Path::Class::Dir::BEGIN@14 at line 85 of Exporter.pm sub heavy_export_tags {
227 | 1 | 6µs | 1 | 15µs | _push_tags((caller)[0], "EXPORT", \@_); # spent 15µs making 1 call to Exporter::Heavy::_push_tags
228 |  |  |  |  | }
229 |  |  |  |  |
230 |  |  |  |  | # spent 34µs (6+28) within Exporter::Heavy::heavy_export_ok_tags which was called: # once (6µs+28µs) by DBI::BEGIN@179 at line 89 of Exporter.pm sub heavy_export_ok_tags {
231 | 1 | 6µs | 1 | 28µs | _push_tags((caller)[0], "EXPORT_OK", \@_); # spent 28µs making 1 call to Exporter::Heavy::_push_tags
232 |  |  |  |  | }
233 |  |  |  |  |
234 | 1 | 2µs |  |  | 1;
|  |  |  |  | # spent 12µs within Exporter::Heavy::CORE:match which was called 18 times, avg 689ns/call: # 9 times (8µs+0s) by Exporter::Heavy::heavy_export at line 57, avg 900ns/call # 3 times (2µs+0s) by Exporter::Heavy::heavy_export at line 63, avg 600ns/call # 3 times (1µs+0s) by Exporter::Heavy::heavy_export at line 105, avg 433ns/call # 3 times (1µs+0s) by Exporter::Heavy::__ANON__[/usr/share/perl/5.18/Exporter/Heavy.pm:44] at line 42, avg 400ns/call sub Exporter::Heavy::CORE:match; # opcode
|  |  |  |  | # spent 260µs within Exporter::Heavy::CORE:subst which was called 1694 times, avg 154ns/call: # 1037 times (83µs+0s) by Exporter::Heavy::_rebuild_cache at line 20, avg 80ns/call # 647 times (170µs+0s) by Exporter::Heavy::heavy_export at line 180, avg 263ns/call # 3 times (4µs+0s) by Exporter::Heavy::heavy_export at line 67, avg 1µs/call # 3 times (1µs+0s) by Exporter::Heavy::heavy_export at line 105, avg 467ns/call # 3 times (1µs+0s) by Exporter::Heavy::heavy_export at line 65, avg 367ns/call # once (400ns+0s) by Exporter::Heavy::_rebuild_cache at line 16 sub Exporter::Heavy::CORE:subst; # opcode