| 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 | Exporter::Heavy::heavy_export |
| 589 | 4 | 2 | 206µs | 206µs | Exporter::Heavy::CORE:subst (opcode) |
| 1 | 1 | 1 | 75µs | 80µs | Exporter::Heavy::_rebuild_cache |
| 2 | 1 | 1 | 34µs | 456µs | Exporter::Heavy::heavy_export_to_level |
| 2 | 1 | 1 | 20µs | 20µs | Exporter::Heavy::_push_tags |
| 1 | 1 | 1 | 20µs | 25µs | Exporter::Heavy::BEGIN@3 |
| 1 | 1 | 1 | 12µs | 24µs | Exporter::Heavy::BEGIN@200 |
| 2 | 1 | 1 | 11µs | 32µs | Exporter::Heavy::heavy_export_ok_tags |
| 17 | 3 | 2 | 11µs | 11µs | Exporter::Heavy::CORE:match (opcode) |
| 1 | 1 | 1 | 7µs | 22µs | Exporter::Heavy::BEGIN@4 |
| 0 | 0 | 0 | 0s | 0s | Exporter::Heavy::__ANON__[:55] |
| 0 | 0 | 0 | 0s | 0s | Exporter::Heavy::__ANON__[:61] |
| 0 | 0 | 0 | 0s | 0s | Exporter::Heavy::heavy_export_tags |
| 0 | 0 | 0 | 0s | 0s | Exporter::Heavy::heavy_require_version |
| 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 |