| Filename | /usr/share/perl/5.18/Exporter/Heavy.pm |
| Statements | Executed 1090 statements in 13.4ms |
| Calls | P | F | Exclusive Time |
Inclusive Time |
Subroutine |
|---|---|---|---|---|---|
| 18 | 1 | 1 | 7.76ms | 12.6ms | Exporter::Heavy::heavy_export |
| 5 | 2 | 1 | 4.11ms | 4.19ms | Exporter::Heavy::_rebuild_cache |
| 1694 | 6 | 1 | 260µs | 260µs | Exporter::Heavy::CORE:subst (opcode) |
| 2 | 2 | 1 | 43µs | 43µs | Exporter::Heavy::_push_tags |
| 3 | 1 | 1 | 28µs | 269µs | Exporter::Heavy::heavy_export_to_level |
| 18 | 4 | 1 | 12µs | 12µs | Exporter::Heavy::CORE:match (opcode) |
| 3 | 1 | 1 | 12µs | 13µs | Exporter::Heavy::__ANON__[:44] |
| 1 | 1 | 1 | 9µs | 44µs | Exporter::Heavy::BEGIN@183 |
| 1 | 1 | 1 | 9µs | 18µs | Exporter::Heavy::BEGIN@3 |
| 1 | 1 | 1 | 6µs | 34µs | Exporter::Heavy::heavy_export_ok_tags |
| 1 | 1 | 1 | 5µs | 12µs | Exporter::Heavy::BEGIN@4 |
| 1 | 1 | 1 | 5µs | 20µs | Exporter::Heavy::heavy_export_tags |
| 0 | 0 | 0 | 0s | 0s | Exporter::Heavy::__ANON__[:38] |
| 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 | 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 # 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 # 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 = $Exporter::VERSION; | ||
| 8 | |||||
| 9 | # | ||||
| 10 | # We go to a lot of trouble not to 'require Carp' at file scope, | ||||
| 11 | # because Carp requires Exporter, and something has to give. | ||||
| 12 | # | ||||
| 13 | |||||
| 14 | sub _rebuild_cache { | ||||
| 15 | 5 | 2µs | my ($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 | ||||
| 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 | ||||
| 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 = $1; | ||
| 183 | 2 | 350µs | 2 | 78µs | # spent 44µs (9+35) within Exporter::Heavy::BEGIN@183 which was called:
# once (9µs+35µs) by Exporter::as_heavy at line 183 # spent 44µs making 1 call to Exporter::Heavy::BEGIN@183
# spent 35µs making 1 call to warnings::unimport |
| 184 | *{"${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 | 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 | ||||
| 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 | ||||
| 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 | |||||
# 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 |