| Filename | /2home/ss5/perl5/perlbrew/perls/perl-5.12.3/lib/5.12.3/constant.pm |
| Statements | Executed 2057 statements in 3.77ms |
| Calls | P | F | Exclusive Time |
Inclusive Time |
Subroutine |
|---|---|---|---|---|---|
| 73 | 73 | 29 | 2.02ms | 2.59ms | constant::import |
| 93 | 1 | 1 | 202µs | 202µs | constant::CORE:match (opcode) |
| 96 | 4 | 1 | 146µs | 146µs | constant::CORE:regcomp (opcode) |
| 1 | 1 | 1 | 29µs | 29µs | constant::BEGIN@2 |
| 1 | 1 | 1 | 15µs | 15µs | constant::BEGIN@25 |
| 1 | 1 | 1 | 10µs | 48µs | constant::BEGIN@6 |
| 1 | 1 | 1 | 8µs | 10µs | constant::BEGIN@3 |
| 1 | 1 | 1 | 6µs | 16µs | constant::BEGIN@114 |
| 1 | 1 | 1 | 6µs | 70µs | constant::BEGIN@4 |
| 1 | 1 | 1 | 6µs | 20µs | constant::BEGIN@29 |
| 1 | 1 | 1 | 5µs | 16µs | constant::BEGIN@52 |
| 3 | 3 | 1 | 5µs | 5µs | constant::CORE:qr (opcode) |
| 1 | 1 | 1 | 4µs | 4µs | constant::__ANON__[:141] |
| 0 | 0 | 0 | 0s | 0s | constant::__ANON__[:137] |
| 0 | 0 | 0 | 0s | 0s | constant::__ANON__[:143] |
| 0 | 0 | 0 | 0s | 0s | constant::__ANON__[:31] |
| Line | State ments |
Time on line |
Calls | Time in subs |
Code |
|---|---|---|---|---|---|
| 1 | package constant; | ||||
| 2 | 3 | 35µs | 1 | 29µs | # spent 29µs within constant::BEGIN@2 which was called:
# once (29µs+0s) by Class::MOP::Method::Meta::BEGIN@16 at line 2 # spent 29µs making 1 call to constant::BEGIN@2 |
| 3 | 3 | 16µs | 2 | 12µs | # spent 10µs (8+2) within constant::BEGIN@3 which was called:
# once (8µs+2µs) by Class::MOP::Method::Meta::BEGIN@16 at line 3 # spent 10µs making 1 call to constant::BEGIN@3
# spent 2µs making 1 call to strict::import |
| 4 | 3 | 21µs | 2 | 134µs | # spent 70µs (6+64) within constant::BEGIN@4 which was called:
# once (6µs+64µs) by Class::MOP::Method::Meta::BEGIN@16 at line 4 # spent 70µs making 1 call to constant::BEGIN@4
# spent 64µs making 1 call to warnings::register::import |
| 5 | |||||
| 6 | 3 | 110µs | 2 | 87µs | # spent 48µs (10+39) within constant::BEGIN@6 which was called:
# once (10µs+39µs) by Class::MOP::Method::Meta::BEGIN@16 at line 6 # spent 48µs making 1 call to constant::BEGIN@6
# spent 39µs making 1 call to vars::import |
| 7 | 1 | 500ns | $VERSION = '1.21'; | ||
| 8 | |||||
| 9 | #======================================================================= | ||||
| 10 | |||||
| 11 | # Some names are evil choices. | ||||
| 12 | 1 | 12µs | my %keywords = map +($_, 1), qw{ BEGIN INIT CHECK END DESTROY AUTOLOAD }; | ||
| 13 | 1 | 2µs | $keywords{UNITCHECK}++ if $] > 5.009; | ||
| 14 | |||||
| 15 | 1 | 6µs | my %forced_into_main = map +($_, 1), | ||
| 16 | qw{ STDIN STDOUT STDERR ARGV ARGVOUT ENV INC SIG }; | ||||
| 17 | |||||
| 18 | 1 | 5µs | my %forbidden = (%keywords, %forced_into_main); | ||
| 19 | |||||
| 20 | 1 | 1µs | my $str_end = $] >= 5.006 ? "\\z" : "\\Z"; | ||
| 21 | 1 | 29µs | 2 | 21µs | my $normal_constant_name = qr/^_?[^\W_0-9]\w*$str_end/; # spent 18µs making 1 call to constant::CORE:regcomp
# spent 3µs making 1 call to constant::CORE:qr |
| 22 | 1 | 9µs | 2 | 5µs | my $tolerable = qr/^[A-Za-z_]\w*$str_end/; # spent 4µs making 1 call to constant::CORE:regcomp
# spent 1µs making 1 call to constant::CORE:qr |
| 23 | 1 | 13µs | 2 | 9µs | my $boolean = qr/^[01]?$str_end/; # spent 8µs making 1 call to constant::CORE:regcomp
# spent 1µs making 1 call to constant::CORE:qr |
| 24 | |||||
| 25 | # spent 15µs within constant::BEGIN@25 which was called:
# once (15µs+0s) by Class::MOP::Method::Meta::BEGIN@16 at line 32 | ||||
| 26 | # We'd like to do use constant _CAN_PCS => $] > 5.009002 | ||||
| 27 | # but that's a bit tricky before we load the constant module :-) | ||||
| 28 | # By doing this, we save 1 run time check for *every* call to import. | ||||
| 29 | 3 | 41µs | 2 | 34µs | # spent 20µs (6+14) within constant::BEGIN@29 which was called:
# once (6µs+14µs) by Class::MOP::Method::Meta::BEGIN@16 at line 29 # spent 20µs making 1 call to constant::BEGIN@29
# spent 14µs making 1 call to strict::unimport |
| 30 | 1 | 2µs | my $const = $] > 5.009002; | ||
| 31 | 1 | 14µs | *_CAN_PCS = sub () {$const}; | ||
| 32 | 1 | 50µs | 1 | 15µs | } # spent 15µs making 1 call to constant::BEGIN@25 |
| 33 | |||||
| 34 | #======================================================================= | ||||
| 35 | # import() - import symbols into user's namespace | ||||
| 36 | # | ||||
| 37 | # What we actually do is define a function in the caller's namespace | ||||
| 38 | # which returns the value. The function we create will normally | ||||
| 39 | # be inlined as a constant, thereby avoiding further sub calling | ||||
| 40 | # overhead. | ||||
| 41 | #======================================================================= | ||||
| 42 | # spent 2.59ms (2.02+568µs) within constant::import which was called 73 times, avg 35µs/call:
# once (94µs+24µs) by Compress::Bzip2::BEGIN@146 at line 146 of Compress/Bzip2.pm
# once (67µs+17µs) by Compress::Bzip2::BEGIN@143 at line 143 of Compress/Bzip2.pm
# once (60µs+12µs) by Compress::Bzip2::BEGIN@153 at line 153 of Compress/Bzip2.pm
# once (43µs+18µs) by Log::Log4perl::BEGIN@69 at line 69 of Log/Log4perl.pm
# once (42µs+16µs) by DateTime::TimeZone::BEGIN@18 at line 18 of DateTime/TimeZone.pm
# once (39µs+19µs) by Log::Log4perl::Config::BaseConfigurator::BEGIN@5 at line 5 of Log/Log4perl/Config/BaseConfigurator.pm
# once (43µs+13µs) by File::stat::BEGIN@144 at line 144 of File/stat.pm
# once (42µs+12µs) by Compress::Bzip2::BEGIN@150 at line 150 of Compress/Bzip2.pm
# once (40µs+14µs) by IPC::Open3::BEGIN@184 at line 184 of IPC/Open3.pm
# once (42µs+12µs) by File::ShareDir::BEGIN@133 at line 133 of File/ShareDir.pm
# once (42µs+12µs) by SQL::Translator::Schema::Constants::BEGIN@81 at line 81 of SQL/Translator/Schema/Constants.pm
# once (41µs+12µs) by YAML::Syck::BEGIN@36 at line 53 of YAML/Syck.pm
# once (38µs+14µs) by YAML::BEGIN@15 at line 15 of YAML.pm
# once (40µs+12µs) by DBD::SQLite::BEGIN@30 at line 30 of DBD/SQLite.pm
# once (38µs+14µs) by Log::Log4perl::Appender::BEGIN@12 at line 12 of Log/Log4perl/Appender.pm
# once (38µs+14µs) by Log::Log4perl::Level::BEGIN@13 at line 13 of Log/Log4perl/Level.pm
# once (40µs+11µs) by Compress::Bzip2::BEGIN@141 at line 141 of Compress/Bzip2.pm
# once (38µs+13µs) by DateTime::Duration::BEGIN@23 at line 23 of DateTime/Duration.pm
# once (35µs+15µs) by Class::MOP::Method::Meta::BEGIN@16 at line 16 of Class/MOP/Method/Meta.pm
# once (37µs+12µs) by namespace::clean::BEGIN@168 at line 168 of namespace/clean.pm
# once (35µs+12µs) by File::Temp::BEGIN@217 at line 217 of File/Temp.pm
# once (35µs+12µs) by Compress::Bzip2::BEGIN@156 at line 156 of Compress/Bzip2.pm
# once (35µs+11µs) by Devel::Backtrace::Point::BEGIN@29 at line 48 of Devel/Backtrace/Point.pm
# once (35µs+10µs) by SQL::Translator::Utils::BEGIN@33 at line 33 of SQL/Translator/Utils.pm
# once (34µs+9µs) by Time::Local::BEGIN@27 at line 27 of Time/Local.pm
# once (31µs+11µs) by Log::Log4perl::Layout::PatternLayout::BEGIN@9 at line 9 of Log/Log4perl/Layout/PatternLayout.pm
# once (25µs+7µs) by Log::Log4perl::Logger::BEGIN@20 at line 20 of Log/Log4perl/Logger.pm
# once (25µs+5µs) by DateTime::TimeZone::BEGIN@24 at line 24 of DateTime/TimeZone.pm
# once (24µs+5µs) by Log::Log4perl::Config::Watch::BEGIN@3 at line 3 of Log/Log4perl/Config/Watch.pm
# once (23µs+6µs) by DateTime::BEGIN@74 at line 74 of DateTime.pm
# once (23µs+5µs) by Log::Log4perl::Config::PropertyConfigurator::BEGIN@17 at line 17 of Log/Log4perl/Config/PropertyConfigurator.pm
# once (22µs+6µs) by Log::Log4perl::Filter::Boolean::BEGIN@13 at line 13 of Log/Log4perl/Filter/Boolean.pm
# once (20µs+8µs) by Log::Log4perl::Level::BEGIN@16 at line 16 of Log/Log4perl/Level.pm
# once (21µs+6µs) by Log::Log4perl::JavaMap::BEGIN@6 at line 6 of Log/Log4perl/JavaMap.pm
# once (19µs+8µs) by SQL::Translator::Schema::Constants::BEGIN@93 at line 93 of SQL/Translator/Schema/Constants.pm
# once (22µs+5µs) by Log::Log4perl::Config::BEGIN@16 at line 16 of Log/Log4perl/Config.pm
# once (20µs+5µs) by Log::Log4perl::Filter::BEGIN@12 at line 12 of Log/Log4perl/Filter.pm
# once (19µs+6µs) by DateTime::TimeZone::BEGIN@19 at line 19 of DateTime/TimeZone.pm
# once (19µs+6µs) by DateTime::TimeZone::BEGIN@22 at line 22 of DateTime/TimeZone.pm
# once (20µs+5µs) by File::Temp::BEGIN@220 at line 220 of File/Temp.pm
# once (22µs+3µs) by DateTime::BEGIN@76 at line 76 of DateTime.pm
# once (20µs+5µs) by SQL::Translator::Schema::Constants::BEGIN@91 at line 91 of SQL/Translator/Schema/Constants.pm
# once (20µs+4µs) by SQL::Translator::Schema::Constants::BEGIN@87 at line 87 of SQL/Translator/Schema/Constants.pm
# once (19µs+5µs) by DateTime::TimeZone::BEGIN@25 at line 25 of DateTime/TimeZone.pm
# once (20µs+5µs) by namespace::clean::BEGIN@169 at line 169 of namespace/clean.pm
# once (19µs+5µs) by DateTime::TimeZone::BEGIN@26 at line 26 of DateTime/TimeZone.pm
# once (19µs+5µs) by SQL::Translator::Schema::Constants::BEGIN@83 at line 83 of SQL/Translator/Schema/Constants.pm
# once (18µs+5µs) by DateTime::TimeZone::BEGIN@28 at line 28 of DateTime/TimeZone.pm
# once (19µs+5µs) by DateTime::TimeZone::BEGIN@23 at line 23 of DateTime/TimeZone.pm
# once (19µs+5µs) by Log::Log4perl::Level::BEGIN@14 at line 14 of Log/Log4perl/Level.pm
# once (20µs+4µs) by File::Temp::BEGIN@228 at line 228 of File/Temp.pm
# once (19µs+4µs) by SQL::Translator::Schema::Constants::BEGIN@89 at line 89 of SQL/Translator/Schema/Constants.pm
# once (18µs+5µs) by DateTime::TimeZone::BEGIN@27 at line 27 of DateTime/TimeZone.pm
# once (19µs+4µs) by SQL::Translator::Schema::Constants::BEGIN@95 at line 95 of SQL/Translator/Schema/Constants.pm
# once (19µs+4µs) by Time::Local::BEGIN@28 at line 28 of Time/Local.pm
# once (19µs+4µs) by Time::Local::BEGIN@29 at line 29 of Time/Local.pm
# once (19µs+4µs) by SQL::Translator::Schema::Constants::BEGIN@97 at line 97 of SQL/Translator/Schema/Constants.pm
# once (19µs+4µs) by Log::Log4perl::Level::BEGIN@15 at line 15 of Log/Log4perl/Level.pm
# once (19µs+4µs) by File::Temp::BEGIN@230 at line 230 of File/Temp.pm
# once (19µs+4µs) by File::Temp::BEGIN@224 at line 224 of File/Temp.pm
# once (18µs+4µs) by Log::Log4perl::Level::BEGIN@17 at line 17 of Log/Log4perl/Level.pm
# once (18µs+5µs) by SQL::Translator::Schema::Constants::BEGIN@85 at line 85 of SQL/Translator/Schema/Constants.pm
# once (18µs+4µs) by DateTime::BEGIN@80 at line 80 of DateTime.pm
# once (19µs+4µs) by Compress::Bzip2::BEGIN@158 at line 158 of Compress/Bzip2.pm
# once (20µs+3µs) by DateTime::BEGIN@78 at line 78 of DateTime.pm
# once (18µs+4µs) by Log::Log4perl::Level::BEGIN@20 at line 20 of Log/Log4perl/Level.pm
# once (18µs+4µs) by Compress::Bzip2::BEGIN@160 at line 160 of Compress/Bzip2.pm
# once (19µs+4µs) by DateTime::BEGIN@82 at line 82 of DateTime.pm
# once (18µs+4µs) by File::Temp::BEGIN@229 at line 229 of File/Temp.pm
# once (18µs+4µs) by Log::Log4perl::Level::BEGIN@19 at line 19 of Log/Log4perl/Level.pm
# once (18µs+4µs) by Log::Log4perl::Level::BEGIN@18 at line 18 of Log/Log4perl/Level.pm
# once (19µs+3µs) by DateTime::BEGIN@77 at line 77 of DateTime.pm
# once (3µs+0s) by Devel::Backtrace::Point::BEGIN@27 at line 27 of Devel/Backtrace/Point.pm | ||||
| 43 | 73 | 44µs | my $class = shift; | ||
| 44 | 73 | 27µs | return unless @_; # Ignore 'use constant;' | ||
| 45 | 72 | 14µs | my $constants; | ||
| 46 | 72 | 35µs | my $multiple = ref $_[0]; | ||
| 47 | 72 | 35µs | my $pkg = caller; | ||
| 48 | 72 | 12µs | my $flush_mro; | ||
| 49 | 72 | 11µs | my $symtab; | ||
| 50 | |||||
| 51 | 72 | 29µs | if (_CAN_PCS) { | ||
| 52 | 3 | 438µs | 2 | 26µs | # spent 16µs (5+10) within constant::BEGIN@52 which was called:
# once (5µs+10µs) by Class::MOP::Method::Meta::BEGIN@16 at line 52 # spent 16µs making 1 call to constant::BEGIN@52
# spent 10µs making 1 call to strict::unimport |
| 53 | 72 | 89µs | $symtab = \%{$pkg . '::'}; | ||
| 54 | }; | ||||
| 55 | |||||
| 56 | 72 | 32µs | if ( $multiple ) { | ||
| 57 | 5 | 2µs | if (ref $_[0] ne 'HASH') { | ||
| 58 | require Carp; | ||||
| 59 | Carp::croak("Invalid reference type '".ref(shift)."' not 'HASH'"); | ||||
| 60 | } | ||||
| 61 | 5 | 1µs | $constants = shift; | ||
| 62 | } else { | ||||
| 63 | 67 | 22µs | unless (defined $_[0]) { | ||
| 64 | require Carp; | ||||
| 65 | Carp::croak("Can't use undef as constant name"); | ||||
| 66 | } | ||||
| 67 | 67 | 89µs | $constants->{+shift} = undef; | ||
| 68 | } | ||||
| 69 | |||||
| 70 | 72 | 112µs | foreach my $name ( keys %$constants ) { | ||
| 71 | # Normal constant name | ||||
| 72 | 93 | 671µs | 186 | 319µs | if ($name =~ $normal_constant_name and !$forbidden{$name}) { # spent 202µs making 93 calls to constant::CORE:match, avg 2µs/call
# spent 117µs making 93 calls to constant::CORE:regcomp, avg 1µs/call |
| 73 | # Everything is okay | ||||
| 74 | |||||
| 75 | # Name forced into main, but we're not in main. Fatal. | ||||
| 76 | } elsif ($forced_into_main{$name} and $pkg ne 'main') { | ||||
| 77 | require Carp; | ||||
| 78 | Carp::croak("Constant name '$name' is forced into main::"); | ||||
| 79 | |||||
| 80 | # Starts with double underscore. Fatal. | ||||
| 81 | } elsif ($name =~ /^__/) { | ||||
| 82 | require Carp; | ||||
| 83 | Carp::croak("Constant name '$name' begins with '__'"); | ||||
| 84 | |||||
| 85 | # Maybe the name is tolerable | ||||
| 86 | } elsif ($name =~ $tolerable) { | ||||
| 87 | # Then we'll warn only if you've asked for warnings | ||||
| 88 | if (warnings::enabled()) { | ||||
| 89 | if ($keywords{$name}) { | ||||
| 90 | warnings::warn("Constant name '$name' is a Perl keyword"); | ||||
| 91 | } elsif ($forced_into_main{$name}) { | ||||
| 92 | warnings::warn("Constant name '$name' is " . | ||||
| 93 | "forced into package main::"); | ||||
| 94 | } | ||||
| 95 | } | ||||
| 96 | |||||
| 97 | # Looks like a boolean | ||||
| 98 | # use constant FRED == fred; | ||||
| 99 | } elsif ($name =~ $boolean) { | ||||
| 100 | require Carp; | ||||
| 101 | if (@_) { | ||||
| 102 | Carp::croak("Constant name '$name' is invalid"); | ||||
| 103 | } else { | ||||
| 104 | Carp::croak("Constant name looks like boolean value"); | ||||
| 105 | } | ||||
| 106 | |||||
| 107 | } else { | ||||
| 108 | # Must have bad characters | ||||
| 109 | require Carp; | ||||
| 110 | Carp::croak("Constant name '$name' has invalid characters"); | ||||
| 111 | } | ||||
| 112 | |||||
| 113 | { | ||||
| 114 | 96 | 297µs | 2 | 25µs | # spent 16µs (6+9) within constant::BEGIN@114 which was called:
# once (6µs+9µs) by Class::MOP::Method::Meta::BEGIN@16 at line 114 # spent 16µs making 1 call to constant::BEGIN@114
# spent 9µs making 1 call to strict::unimport |
| 115 | 93 | 65µs | my $full_name = "${pkg}::$name"; | ||
| 116 | 93 | 124µs | $declared{$full_name}++; | ||
| 117 | 93 | 70µs | if ($multiple || @_ == 1) { | ||
| 118 | 92 | 40µs | my $scalar = $multiple ? $constants->{$name} : $_[0]; | ||
| 119 | |||||
| 120 | # Work around perl bug #xxxxx: Sub names (actually glob | ||||
| 121 | # names in general) ignore the UTF8 flag. So we have to | ||||
| 122 | # turn it off to get the "right" symbol table entry. | ||||
| 123 | 92 | 250µs | 92 | 67µs | utf8::is_utf8 $name and utf8::encode $name # spent 67µs making 92 calls to utf8::is_utf8, avg 726ns/call |
| 124 | if defined &utf8::is_utf8; | ||||
| 125 | |||||
| 126 | # The constant serves to optimise this entire block out on | ||||
| 127 | # 5.8 and earlier. | ||||
| 128 | 92 | 66µs | if (_CAN_PCS && $symtab && !exists $symtab->{$name}) { | ||
| 129 | # No typeglob yet, so we can use a reference as space- | ||||
| 130 | # efficient proxy for a constant subroutine | ||||
| 131 | # The check in Perl_ck_rvconst knows that inlinable | ||||
| 132 | # constants from cv_const_sv are read only. So we have to: | ||||
| 133 | 89 | 205µs | 89 | 69µs | Internals::SvREADONLY($scalar, 1); # spent 69µs making 89 calls to Internals::SvREADONLY, avg 771ns/call |
| 134 | 89 | 56µs | $symtab->{$name} = \$scalar; | ||
| 135 | 89 | 28µs | ++$flush_mro; | ||
| 136 | } else { | ||||
| 137 | 3 | 15µs | *$full_name = sub () { $scalar }; | ||
| 138 | } | ||||
| 139 | } elsif (@_) { | ||||
| 140 | 1 | 6µs | my @list = @_; | ||
| 141 | 2 | 11µs | # spent 4µs within constant::__ANON__[/2home/ss5/perl5/perlbrew/perls/perl-5.12.3/lib/5.12.3/constant.pm:141] which was called:
# once (4µs+0s) by Devel::Backtrace::BEGIN@4 at line 68 of Devel/Backtrace/Point.pm | ||
| 142 | } else { | ||||
| 143 | *$full_name = sub () { }; | ||||
| 144 | } | ||||
| 145 | } | ||||
| 146 | } | ||||
| 147 | # Flush the cache exactly once if we make any direct symbol table changes. | ||||
| 148 | 72 | 496µs | 68 | 113µs | mro::method_changed_in($pkg) if _CAN_PCS && $flush_mro; # spent 113µs making 68 calls to mro::method_changed_in, avg 2µs/call |
| 149 | } | ||||
| 150 | |||||
| 151 | 1 | 11µs | 1; | ||
| 152 | |||||
| 153 | __END__ | ||||
# spent 202µs within constant::CORE:match which was called 93 times, avg 2µs/call:
# 93 times (202µs+0s) by constant::import at line 72, avg 2µs/call | |||||
sub constant::CORE:qr; # opcode | |||||
# spent 146µs within constant::CORE:regcomp which was called 96 times, avg 2µs/call:
# 93 times (117µs+0s) by constant::import at line 72, avg 1µs/call
# once (18µs+0s) by Class::MOP::Method::Meta::BEGIN@16 at line 21
# once (8µs+0s) by Class::MOP::Method::Meta::BEGIN@16 at line 23
# once (4µs+0s) by Class::MOP::Method::Meta::BEGIN@16 at line 22 |