File | /usr/local/lib/perl5/5.10.1/Exporter/Heavy.pm |
Statements Executed | 914 |
Statement Execution Time | 5.17ms |
Calls | P | F | Exclusive Time |
Inclusive Time |
Subroutine |
---|---|---|---|---|---|
14 | 1 | 1 | 2.69ms | 2.99ms | heavy_export | Exporter::Heavy::
589 | 4 | 2 | 206µs | 206µs | CORE:subst (opcode) | Exporter::Heavy::
1 | 1 | 1 | 75µs | 80µs | _rebuild_cache | Exporter::Heavy::
2 | 1 | 1 | 34µs | 456µs | heavy_export_to_level | Exporter::Heavy::
2 | 1 | 1 | 20µs | 20µs | _push_tags | Exporter::Heavy::
1 | 1 | 1 | 20µs | 25µs | BEGIN@3 | Exporter::Heavy::
1 | 1 | 1 | 12µs | 24µs | BEGIN@200 | Exporter::Heavy::
2 | 1 | 1 | 11µs | 32µs | heavy_export_ok_tags | Exporter::Heavy::
17 | 3 | 2 | 11µs | 11µs | CORE:match (opcode) | Exporter::Heavy::
1 | 1 | 1 | 7µs | 22µs | BEGIN@4 | Exporter::Heavy::
0 | 0 | 0 | 0s | 0s | __ANON__[:55] | Exporter::Heavy::
0 | 0 | 0 | 0s | 0s | __ANON__[:61] | Exporter::Heavy::
0 | 0 | 0 | 0s | 0s | heavy_export_tags | Exporter::Heavy::
0 | 0 | 0 | 0s | 0s | heavy_require_version | Exporter::Heavy::
Line | State ments |
Time on line |
Calls | Time in subs |
Code |
---|---|---|---|---|---|
1 | package Exporter::Heavy; | ||||
2 | |||||
3 | 3 | 34µs | 2 | 30µs | # spent 25µs (20+5) within Exporter::Heavy::BEGIN@3 which was called
# once (20µs+5µs) by Exporter::as_heavy at line 3 # spent 25µs making 1 call to Exporter::Heavy::BEGIN@3
# spent 5µs making 1 call to strict::import |
4 | 3 | 1.12ms | 2 | 38µs | # spent 22µs (7+15) within Exporter::Heavy::BEGIN@4 which was called
# once (7µs+15µs) by Exporter::as_heavy at line 4 # spent 22µs making 1 call to Exporter::Heavy::BEGIN@4
# spent 15µs making 1 call to strict::unimport |
5 | |||||
6 | # On one line so MakeMaker will see it. | ||||
7 | 2 | 4µs | require Exporter; our $VERSION = $Exporter::VERSION; | ||
8 | |||||
9 | # Carp 1.05+ does this now for us, but we may be running with an old Carp | ||||
10 | 1 | 2µs | $Carp::Internal{'Exporter::Heavy'}++; | ||
11 | |||||
12 | =head1 NAME | ||||
13 | |||||
14 | Exporter::Heavy - Exporter guts | ||||
15 | |||||
16 | =head1 SYNOPSIS | ||||
17 | |||||
18 | (internal use only) | ||||
19 | |||||
20 | =head1 DESCRIPTION | ||||
21 | |||||
22 | No user-serviceable parts inside. | ||||
23 | |||||
24 | =cut | ||||
25 | |||||
26 | # | ||||
27 | # We go to a lot of trouble not to 'require Carp' at file scope, | ||||
28 | # because Carp requires Exporter, and something has to give. | ||||
29 | # | ||||
30 | |||||
31 | # spent 80µs (75+4) within Exporter::Heavy::_rebuild_cache which was called
# once (75µs+4µs) by Exporter::Heavy::heavy_export at line 70 | ||||
32 | 6 | 11µs | my ($pkg, $exports, $cache) = @_; | ||
33 | s/^&// foreach @$exports; | ||||
34 | @{$cache}{@$exports} = (1) x @$exports; | ||||
35 | my $ok = \@{"${pkg}::EXPORT_OK"}; | ||||
36 | 3 | 20µs | if (@$ok) { | ||
37 | s/^&// foreach @$ok; # spent 4µs making 38 calls to Exporter::Heavy::CORE:subst, avg 116ns/call | ||||
38 | 1 | 44µs | @{$cache}{@$ok} = (1) x @$ok; | ||
39 | } | ||||
40 | } | ||||
41 | |||||
42 | # spent 2.99ms (2.69+292µs) within Exporter::Heavy::heavy_export which was called 14 times, avg 213µs/call:
# 14 times (2.69ms+292µs) by Exporter::Heavy::heavy_export_to_level or Exporter::import or FileHandle::import or IO::Socket::import at line 28 of Exporter.pm, avg 213µs/call | ||||
43 | |||||
44 | # First make import warnings look like they're coming from the "use". | ||||
45 | local $SIG{__WARN__} = sub { | ||||
46 | my $text = shift; | ||||
47 | if ($text =~ s/ at \S*Exporter\S*.pm line \d+.*\n//) { | ||||
48 | require Carp; | ||||
49 | local $Carp::CarpLevel = 1; # ignore package calling us too. | ||||
50 | Carp::carp($text); | ||||
51 | } | ||||
52 | else { | ||||
53 | warn $text; | ||||
54 | } | ||||
55 | 140 | 478µs | }; | ||
56 | local $SIG{__DIE__} = sub { | ||||
57 | require Carp; | ||||
58 | local $Carp::CarpLevel = 1; # ignore package calling us too. | ||||
59 | Carp::croak("$_[0]Illegal null symbol in \@${1}::EXPORT") | ||||
60 | if $_[0] =~ /^Unable to create sub named "(.*?)::"/; | ||||
61 | }; | ||||
62 | |||||
63 | my($pkg, $callpkg, @imports) = @_; | ||||
64 | my($type, $sym, $cache_is_current, $oops); | ||||
65 | my($exports, $export_cache) = (\@{"${pkg}::EXPORT"}, | ||||
66 | $Exporter::Cache{$pkg} ||= {}); | ||||
67 | |||||
68 | 42 | 208µs | if (@imports) { | ||
69 | 2 | 3µs | if (!%$export_cache) { | ||
70 | _rebuild_cache ($pkg, $exports, $export_cache); # spent 80µs making 1 call to Exporter::Heavy::_rebuild_cache | ||||
71 | $cache_is_current = 1; | ||||
72 | } | ||||
73 | |||||
74 | 42 | 59µs | 9 | 7µs | if (grep m{^[/!:]}, @imports) { # spent 7µs making 9 calls to Exporter::Heavy::CORE:match, avg 778ns/call |
75 | my $tagsref = \%{"${pkg}::EXPORT_TAGS"}; | ||||
76 | my $tagdata; | ||||
77 | my %imports; | ||||
78 | my($remove, $spec, @names, @allexports); | ||||
79 | # negated first item implies starting with default set: | ||||
80 | unshift @imports, ':DEFAULT' if $imports[0] =~ m/^!/; # spent 2µs making 6 calls to Exporter::Heavy::CORE:match, avg 383ns/call | ||||
81 | foreach $spec (@imports){ | ||||
82 | 32 | 55µs | 8 | 3µs | $remove = $spec =~ s/^!//; # spent 3µs making 8 calls to Exporter::Heavy::CORE:subst, avg 362ns/call |
83 | |||||
84 | 8 | 28µs | 10 | 8µs | if ($spec =~ s/^://){ # spent 6µs making 8 calls to Exporter::Heavy::CORE:subst, avg 762ns/call
# spent 1µs making 2 calls to Exporter::Heavy::CORE:match, avg 700ns/call |
85 | if ($spec eq 'DEFAULT'){ | ||||
86 | @names = @$exports; | ||||
87 | } | ||||
88 | elsif ($tagdata = $tagsref->{$spec}) { | ||||
89 | @names = @$tagdata; | ||||
90 | } | ||||
91 | else { | ||||
92 | warn qq["$spec" is not defined in %${pkg}::EXPORT_TAGS]; | ||||
93 | ++$oops; | ||||
94 | next; | ||||
95 | } | ||||
96 | } | ||||
97 | elsif ($spec =~ m:^/(.*)/$:){ | ||||
98 | my $patn = $1; | ||||
99 | @allexports = keys %$export_cache unless @allexports; # only do keys once | ||||
100 | @names = grep(/$patn/, @allexports); # not anchored by default | ||||
101 | } | ||||
102 | else { | ||||
103 | @names = ($spec); # is a normal symbol name | ||||
104 | } | ||||
105 | |||||
106 | warn "Import ".($remove ? "del":"add").": @names " | ||||
107 | if $Exporter::Verbose; | ||||
108 | |||||
109 | 8 | 23µs | if ($remove) { | ||
110 | foreach $sym (@names) { delete $imports{$sym} } | ||||
111 | } | ||||
112 | else { | ||||
113 | @imports{@names} = (1) x @names; | ||||
114 | } | ||||
115 | } | ||||
116 | @imports = keys %imports; | ||||
117 | } | ||||
118 | |||||
119 | my @carp; | ||||
120 | foreach $sym (@imports) { | ||||
121 | 46 | 15µs | if (!$export_cache->{$sym}) { | ||
122 | if ($sym =~ m/^\d/) { | ||||
123 | $pkg->VERSION($sym); # inherit from UNIVERSAL | ||||
124 | # If the version number was the only thing specified | ||||
125 | # then we should act as if nothing was specified: | ||||
126 | if (@imports == 1) { | ||||
127 | @imports = @$exports; | ||||
128 | last; | ||||
129 | } | ||||
130 | # We need a way to emulate 'use Foo ()' but still | ||||
131 | # allow an easy version check: "use Foo 1.23, ''"; | ||||
132 | if (@imports == 2 and !$imports[1]) { | ||||
133 | @imports = (); | ||||
134 | last; | ||||
135 | } | ||||
136 | } elsif ($sym !~ s/^&// || !$export_cache->{$sym}) { | ||||
137 | # Last chance - see if they've updated EXPORT_OK since we | ||||
138 | # cached it. | ||||
139 | |||||
140 | unless ($cache_is_current) { | ||||
141 | %$export_cache = (); | ||||
142 | _rebuild_cache ($pkg, $exports, $export_cache); | ||||
143 | $cache_is_current = 1; | ||||
144 | } | ||||
145 | |||||
146 | if (!$export_cache->{$sym}) { | ||||
147 | # accumulate the non-exports | ||||
148 | push @carp, | ||||
149 | qq["$sym" is not exported by the $pkg module\n]; | ||||
150 | $oops++; | ||||
151 | } | ||||
152 | } | ||||
153 | } | ||||
154 | } | ||||
155 | if ($oops) { | ||||
156 | require Carp; | ||||
157 | Carp::croak("@{carp}Can't continue after import errors"); | ||||
158 | } | ||||
159 | } | ||||
160 | else { | ||||
161 | @imports = @$exports; | ||||
162 | } | ||||
163 | |||||
164 | my($fail, $fail_cache) = (\@{"${pkg}::EXPORT_FAIL"}, | ||||
165 | $Exporter::FailCache{$pkg} ||= {}); | ||||
166 | |||||
167 | if (@$fail) { | ||||
168 | if (!%$fail_cache) { | ||||
169 | # Build cache of symbols. Optimise the lookup by adding | ||||
170 | # barewords twice... both with and without a leading &. | ||||
171 | # (Technique could be applied to $export_cache at cost of memory) | ||||
172 | my @expanded = map { /^\w/ ? ($_, '&'.$_) : $_ } @$fail; | ||||
173 | warn "${pkg}::EXPORT_FAIL cached: @expanded" if $Exporter::Verbose; | ||||
174 | @{$fail_cache}{@expanded} = (1) x @expanded; | ||||
175 | } | ||||
176 | my @failed; | ||||
177 | foreach $sym (@imports) { push(@failed, $sym) if $fail_cache->{$sym} } | ||||
178 | if (@failed) { | ||||
179 | @failed = $pkg->export_fail(@failed); | ||||
180 | foreach $sym (@failed) { | ||||
181 | require Carp; | ||||
182 | Carp::carp(qq["$sym" is not implemented by the $pkg module ], | ||||
183 | "on this architecture"); | ||||
184 | } | ||||
185 | if (@failed) { | ||||
186 | require Carp; | ||||
187 | Carp::croak("Can't continue after import errors"); | ||||
188 | } | ||||
189 | } | ||||
190 | } | ||||
191 | |||||
192 | warn "Importing into $callpkg from $pkg: ", | ||||
193 | join(", ",sort @imports) if $Exporter::Verbose; | ||||
194 | |||||
195 | foreach $sym (@imports) { | ||||
196 | # shortcut for the common case of no type character | ||||
197 | 549 | 1.93ms | 535 | 193µs | (*{"${callpkg}::$sym"} = \&{"${pkg}::$sym"}, next) # spent 193µs making 535 calls to Exporter::Heavy::CORE:subst, avg 360ns/call |
198 | unless $sym =~ s/^(\W)//; | ||||
199 | $type = $1; | ||||
200 | 3 | 1.08ms | 2 | 36µs | # spent 24µs (12+12) within Exporter::Heavy::BEGIN@200 which was called
# once (12µs+12µs) by Exporter::as_heavy at line 200 # spent 24µs making 1 call to Exporter::Heavy::BEGIN@200
# spent 12µs making 1 call to warnings::unimport |
201 | *{"${callpkg}::$sym"} = | ||||
202 | $type eq '&' ? \&{"${pkg}::$sym"} : | ||||
203 | $type eq '$' ? \${"${pkg}::$sym"} : | ||||
204 | $type eq '@' ? \@{"${pkg}::$sym"} : | ||||
205 | $type eq '%' ? \%{"${pkg}::$sym"} : | ||||
206 | $type eq '*' ? *{"${pkg}::$sym"} : | ||||
207 | do { require Carp; Carp::croak("Can't export symbol: $type$sym") }; | ||||
208 | } | ||||
209 | } | ||||
210 | |||||
211 | sub heavy_export_to_level | ||||
212 | # spent 456µs (34+422) within Exporter::Heavy::heavy_export_to_level which was called 2 times, avg 228µs/call:
# 2 times (34µs+422µs) by Test::Builder::Module::import or Time::HiRes::import at line 82 of Exporter.pm, avg 228µs/call | ||||
213 | 10 | 24µs | my $pkg = shift; | ||
214 | my $level = shift; | ||||
215 | (undef) = shift; # XXX redundant arg | ||||
216 | my $callpkg = caller($level); | ||||
217 | $pkg->export($callpkg, @_); # spent 30µs making 2 calls to Exporter::export, avg 15µs/call | ||||
218 | } | ||||
219 | |||||
220 | # Utility functions | ||||
221 | |||||
222 | # spent 20µs within Exporter::Heavy::_push_tags which was called 2 times, avg 10µs/call:
# 2 times (20µs+0s) by Exporter::Heavy::heavy_export_ok_tags at line 248, avg 10µs/call | ||||
223 | 10 | 22µs | my($pkg, $var, $syms) = @_; | ||
224 | my @nontag = (); | ||||
225 | my $export_tags = \%{"${pkg}::EXPORT_TAGS"}; | ||||
226 | push(@{"${pkg}::$var"}, | ||||
227 | map { $export_tags->{$_} ? @{$export_tags->{$_}} | ||||
228 | : scalar(push(@nontag,$_),$_) } | ||||
229 | (@$syms) ? @$syms : keys %$export_tags); | ||||
230 | if (@nontag and $^W) { | ||||
231 | # This may change to a die one day | ||||
232 | require Carp; | ||||
233 | Carp::carp(join(", ", @nontag)." are not tags of $pkg"); | ||||
234 | } | ||||
235 | } | ||||
236 | |||||
237 | sub heavy_require_version { | ||||
238 | my($self, $wanted) = @_; | ||||
239 | my $pkg = ref $self || $self; | ||||
240 | return ${pkg}->VERSION($wanted); | ||||
241 | } | ||||
242 | |||||
243 | sub heavy_export_tags { | ||||
244 | _push_tags((caller)[0], "EXPORT", \@_); | ||||
245 | } | ||||
246 | |||||
247 | # spent 32µs (11+20) within Exporter::Heavy::heavy_export_ok_tags which was called 2 times, avg 16µs/call:
# 2 times (11µs+20µs) by IO::Uncompress::Gunzip::BEGIN@12 or Net::HTTP::Methods::gunzip_ok at line 90 of Exporter.pm, avg 16µs/call | ||||
248 | 2 | 12µs | 2 | 20µs | _push_tags((caller)[0], "EXPORT_OK", \@_); # spent 20µs making 2 calls to Exporter::Heavy::_push_tags, avg 10µs/call |
249 | } | ||||
250 | |||||
251 | 1 | 13µs | 1; | ||
# spent 11µs within Exporter::Heavy::CORE:match which was called 17 times, avg 629ns/call:
# 9 times (7µs+0s) by Exporter::Heavy::heavy_export at line 74 of Exporter/Heavy.pm, avg 778ns/call
# 6 times (2µs+0s) by Exporter::Heavy::heavy_export at line 80 of Exporter/Heavy.pm, avg 383ns/call
# 2 times (1µs+0s) by Exporter::Heavy::heavy_export at line 84 of Exporter/Heavy.pm, avg 700ns/call | |||||
# spent 206µs within Exporter::Heavy::CORE:subst which was called 589 times, avg 350ns/call:
# 535 times (193µs+0s) by Exporter::Heavy::heavy_export at line 197 of Exporter/Heavy.pm, avg 360ns/call
# 38 times (4µs+0s) by Exporter::Heavy::_rebuild_cache at line 37 of Exporter/Heavy.pm, avg 116ns/call
# 8 times (6µs+0s) by Exporter::Heavy::heavy_export at line 84 of Exporter/Heavy.pm, avg 762ns/call
# 8 times (3µs+0s) by Exporter::Heavy::heavy_export at line 82 of Exporter/Heavy.pm, avg 362ns/call |