Filename | /usr/share/perl/5.18/constant.pm |
Statements | Executed 1881 statements in 3.68ms |
Calls | P | F | Exclusive Time |
Inclusive Time |
Subroutine |
---|---|---|---|---|---|
66 | 66 | 24 | 2.05ms | 2.67ms | import | constant::
93 | 1 | 1 | 222µs | 222µs | CORE:match (opcode) | constant::
93 | 1 | 1 | 164µs | 164µs | CORE:regcomp (opcode) | constant::
1 | 1 | 1 | 13µs | 13µs | BEGIN@24 | constant::
1 | 1 | 1 | 12µs | 12µs | BEGIN@2 | constant::
1 | 1 | 1 | 8µs | 16µs | BEGIN@28 | constant::
1 | 1 | 1 | 6µs | 14µs | BEGIN@116 | constant::
1 | 1 | 1 | 6µs | 33µs | BEGIN@6 | constant::
1 | 1 | 1 | 6µs | 14µs | BEGIN@54 | constant::
1 | 1 | 1 | 6µs | 72µs | BEGIN@4 | constant::
1 | 1 | 1 | 5µs | 14µs | BEGIN@3 | constant::
3 | 3 | 1 | 3µs | 3µs | CORE:qr (opcode) | constant::
0 | 0 | 0 | 0s | 0s | __ANON__[:140] | constant::
0 | 0 | 0 | 0s | 0s | __ANON__[:144] | constant::
0 | 0 | 0 | 0s | 0s | __ANON__[:146] | constant::
0 | 0 | 0 | 0s | 0s | __ANON__[:30] | constant::
0 | 0 | 0 | 0s | 0s | __ANON__[:33] | constant::
Line | State ments |
Time on line |
Calls | Time in subs |
Code |
---|---|---|---|---|---|
1 | package constant; | ||||
2 | 2 | 43µs | 1 | 12µs | # spent 12µs within constant::BEGIN@2 which was called:
# once (12µs+0s) by Try::Tiny::ScopeGuard::BEGIN@144 at line 2 # spent 12µs making 1 call to constant::BEGIN@2 |
3 | 2 | 18µs | 2 | 23µs | # spent 14µs (5+9) within constant::BEGIN@3 which was called:
# once (5µs+9µs) by Try::Tiny::ScopeGuard::BEGIN@144 at line 3 # spent 14µs making 1 call to constant::BEGIN@3
# spent 9µs making 1 call to strict::import |
4 | 2 | 23µs | 2 | 138µs | # spent 72µs (6+66) within constant::BEGIN@4 which was called:
# once (6µs+66µs) by Try::Tiny::ScopeGuard::BEGIN@144 at line 4 # spent 72µs making 1 call to constant::BEGIN@4
# spent 66µs making 1 call to warnings::register::import |
5 | |||||
6 | 2 | 109µs | 2 | 60µs | # spent 33µs (6+27) within constant::BEGIN@6 which was called:
# once (6µs+27µs) by Try::Tiny::ScopeGuard::BEGIN@144 at line 6 # spent 33µs making 1 call to constant::BEGIN@6
# spent 27µs making 1 call to vars::import |
7 | 1 | 400ns | $VERSION = '1.27'; | ||
8 | |||||
9 | #======================================================================= | ||||
10 | |||||
11 | # Some names are evil choices. | ||||
12 | 1 | 4µs | my %keywords = map +($_, 1), qw{ BEGIN INIT CHECK END DESTROY AUTOLOAD }; | ||
13 | 1 | 1µs | $keywords{UNITCHECK}++ if $] > 5.009; | ||
14 | |||||
15 | 1 | 5µs | my %forced_into_main = map +($_, 1), | ||
16 | qw{ STDIN STDOUT STDERR ARGV ARGVOUT ENV INC SIG }; | ||||
17 | |||||
18 | 1 | 4µs | my %forbidden = (%keywords, %forced_into_main); | ||
19 | |||||
20 | 1 | 6µs | 1 | 2µs | my $normal_constant_name = qr/^_?[^\W_0-9]\w*\z/; # spent 2µs making 1 call to constant::CORE:qr |
21 | 1 | 3µs | 1 | 700ns | my $tolerable = qr/^[A-Za-z_]\w*\z/; # spent 700ns making 1 call to constant::CORE:qr |
22 | 1 | 2µs | 1 | 500ns | my $boolean = qr/^[01]?\z/; # spent 500ns making 1 call to constant::CORE:qr |
23 | |||||
24 | # spent 13µs within constant::BEGIN@24 which was called:
# once (13µs+0s) by Try::Tiny::ScopeGuard::BEGIN@144 at line 34 | ||||
25 | # We'd like to do use constant _CAN_PCS => $] > 5.009002 | ||||
26 | # but that's a bit tricky before we load the constant module :-) | ||||
27 | # By doing this, we save 1 run time check for *every* call to import. | ||||
28 | 2 | 60µs | 2 | 25µs | # spent 16µs (8+9) within constant::BEGIN@28 which was called:
# once (8µs+9µs) by Try::Tiny::ScopeGuard::BEGIN@144 at line 28 # spent 16µs making 1 call to constant::BEGIN@28
# spent 9µs making 1 call to strict::unimport |
29 | 1 | 700ns | my $const = $] > 5.009002; | ||
30 | 1 | 7µs | *_CAN_PCS = sub () {$const}; | ||
31 | |||||
32 | 1 | 400ns | my $downgrade = $] < 5.015004; # && $] >= 5.008 | ||
33 | 1 | 7µs | *_DOWNGRADE = sub () { $downgrade }; | ||
34 | 1 | 86µs | 1 | 13µs | } # spent 13µs making 1 call to constant::BEGIN@24 |
35 | |||||
36 | #======================================================================= | ||||
37 | # import() - import symbols into user's namespace | ||||
38 | # | ||||
39 | # What we actually do is define a function in the caller's namespace | ||||
40 | # which returns the value. The function we create will normally | ||||
41 | # be inlined as a constant, thereby avoiding further sub calling | ||||
42 | # overhead. | ||||
43 | #======================================================================= | ||||
44 | # spent 2.67ms (2.05+620µs) within constant::import which was called 66 times, avg 40µs/call:
# once (92µs+47µs) by Time::Piece::BEGIN@34 at line 34 of Time/Piece.pm
# once (100µs+40µs) by Time::Seconds::BEGIN@23 at line 23 of Time/Seconds.pm
# once (120µs+7µs) by Try::Tiny::ScopeGuard::BEGIN@144 at line 144 of Try/Tiny.pm
# once (81µs+34µs) by PONAPI::Server::BEGIN@22 at line 23 of lib/PONAPI/Server.pm
# once (89µs+22µs) by POSIX::strftime::Compiler::BEGIN@14 at line 15 of POSIX/strftime/Compiler.pm
# once (37µs+67µs) by Time::Seconds::BEGIN@36 at line 36 of Time/Seconds.pm
# once (51µs+15µs) by Time::Seconds::BEGIN@25 at line 25 of Time/Seconds.pm
# once (50µs+13µs) by Apache::LogFormat::Compiler::BEGIN@8 at line 9 of Apache/LogFormat/Compiler.pm
# once (52µs+10µs) by Time::Seconds::BEGIN@26 at line 26 of Time/Seconds.pm
# once (47µs+14µs) by Hash::MultiValue::BEGIN@12 at line 12 of Hash/MultiValue.pm
# once (41µs+12µs) by PONAPI::Constants::BEGIN@8 at line 15 of lib/PONAPI/Constants.pm
# once (44µs+8µs) by Time::Seconds::BEGIN@24 at line 24 of Time/Seconds.pm
# once (32µs+13µs) by YAML::XS::BEGIN@101 at line 118 of YAML/XS.pm
# once (34µs+11µs) by HTTP::Parser::XS::BEGIN@16 at line 17 of HTTP/Parser/XS.pm
# once (32µs+12µs) by DBD::SQLite::BEGIN@20 at line 20 of DBD/SQLite.pm
# once (36µs+7µs) by Time::Seconds::BEGIN@27 at line 27 of Time/Seconds.pm
# once (32µs+9µs) by Moose::Meta::Role::Application::ToInstance::BEGIN@20 at line 20 of Moose/Meta/Role/Application/ToInstance.pm
# once (31µs+9µs) by Time::Seconds::BEGIN@37 at line 37 of Time/Seconds.pm
# once (30µs+9µs) by Data::Dumper::BEGIN@271 at line 271 of Data/Dumper.pm
# once (30µs+10µs) by Time::Seconds::BEGIN@28 at line 28 of Time/Seconds.pm
# once (31µs+8µs) by HTTP::Server::PSGI::BEGIN@31 at line 31 of HTTP/Server/PSGI.pm
# once (31µs+7µs) by Time::Local::BEGIN@27 at line 27 of Time/Local.pm
# once (28µs+9µs) by Test::PONAPI::Repository::MockDB::Table::Articles::BEGIN@9 at line 9 of lib/Test/PONAPI/Repository/MockDB/Table/Articles.pm
# once (29µs+7µs) by File::stat::BEGIN@154 at line 154 of File/stat.pm
# once (30µs+6µs) by Time::Seconds::BEGIN@29 at line 29 of Time/Seconds.pm
# once (28µs+8µs) by Time::Seconds::BEGIN@31 at line 31 of Time/Seconds.pm
# once (27µs+8µs) by Getopt::Long::BEGIN@215 at line 215 of Getopt/Long.pm
# once (27µs+8µs) by File::Temp::BEGIN@221 at line 221 of File/Temp.pm
# once (29µs+6µs) by Time::Seconds::BEGIN@30 at line 30 of Time/Seconds.pm
# once (27µs+7µs) by Time::Seconds::BEGIN@33 at line 33 of Time/Seconds.pm
# once (27µs+8µs) by Class::MOP::Method::Meta::BEGIN@10 at line 10 of Class/MOP/Method/Meta.pm
# once (27µs+7µs) by Eval::Closure::BEGIN@20 at line 20 of Eval/Closure.pm
# once (27µs+8µs) by Time::Piece::BEGIN@35 at line 35 of Time/Piece.pm
# once (26µs+7µs) by Plack::Util::BEGIN@13 at line 13 of Plack/Util.pm
# once (26µs+8µs) by App::Cmd::BEGIN@346 at line 346 of App/Cmd.pm
# once (26µs+7µs) by Class::MOP::Mixin::HasOverloads::BEGIN@50 at line 50 of Class/MOP/Mixin/HasOverloads.pm
# once (26µs+6µs) by Time::Piece::BEGIN@44 at line 44 of Time/Piece.pm
# once (23µs+7µs) by Time::Seconds::BEGIN@32 at line 32 of Time/Seconds.pm
# once (25µs+4µs) by Time::Piece::BEGIN@37 at line 37 of Time/Piece.pm
# once (24µs+5µs) by Time::Piece::BEGIN@36 at line 36 of Time/Piece.pm
# once (24µs+5µs) by Time::Piece::BEGIN@38 at line 38 of Time/Piece.pm
# once (22µs+6µs) by Time::Piece::BEGIN@39 at line 39 of Time/Piece.pm
# once (22µs+5µs) by Time::Piece::BEGIN@43 at line 43 of Time/Piece.pm
# once (22µs+4µs) by Time::Piece::BEGIN@42 at line 42 of Time/Piece.pm
# once (21µs+6µs) by Time::Piece::BEGIN@41 at line 41 of Time/Piece.pm
# once (21µs+5µs) by Time::Piece::BEGIN@40 at line 40 of Time/Piece.pm
# once (18µs+5µs) by HTTP::Server::PSGI::BEGIN@32 at line 32 of HTTP/Server/PSGI.pm
# once (16µs+7µs) by Getopt::Long::BEGIN@230 at line 230 of Getopt/Long.pm
# once (17µs+4µs) by Getopt::Long::BEGIN@225 at line 225 of Getopt/Long.pm
# once (17µs+4µs) by File::Temp::BEGIN@224 at line 224 of File/Temp.pm
# once (17µs+4µs) by Time::Local::BEGIN@28 at line 28 of Time/Local.pm
# once (17µs+4µs) by File::Temp::BEGIN@228 at line 228 of File/Temp.pm
# once (16µs+4µs) by Getopt::Long::BEGIN@227 at line 227 of Getopt/Long.pm
# once (16µs+4µs) by Getopt::Long::BEGIN@244 at line 244 of Getopt/Long.pm
# once (16µs+4µs) by Time::Local::BEGIN@29 at line 29 of Time/Local.pm
# once (16µs+4µs) by File::Temp::BEGIN@232 at line 232 of File/Temp.pm
# once (16µs+4µs) by Getopt::Long::BEGIN@229 at line 229 of Getopt/Long.pm
# once (16µs+4µs) by Getopt::Long::BEGIN@232 at line 232 of Getopt/Long.pm
# once (16µs+4µs) by File::Temp::BEGIN@233 at line 233 of File/Temp.pm
# once (16µs+3µs) by File::Temp::BEGIN@234 at line 234 of File/Temp.pm
# once (15µs+4µs) by Getopt::Long::BEGIN@231 at line 231 of Getopt/Long.pm
# once (15µs+3µs) by Getopt::Long::BEGIN@254 at line 254 of Getopt/Long.pm
# once (15µs+3µs) by Getopt::Long::BEGIN@235 at line 235 of Getopt/Long.pm
# once (15µs+3µs) by Getopt::Long::BEGIN@233 at line 233 of Getopt/Long.pm
# once (14µs+3µs) by Getopt::Long::BEGIN@236 at line 236 of Getopt/Long.pm
# once (14µs+4µs) by Getopt::Long::BEGIN@243 at line 243 of Getopt/Long.pm | ||||
45 | 66 | 35µs | my $class = shift; | ||
46 | 66 | 34µs | return unless @_; # Ignore 'use constant;' | ||
47 | 66 | 12µs | my $constants; | ||
48 | 66 | 42µs | my $multiple = ref $_[0]; | ||
49 | 66 | 41µs | my $pkg = caller; | ||
50 | 66 | 12µs | my $flush_mro; | ||
51 | 66 | 5µs | my $symtab; | ||
52 | |||||
53 | 66 | 26µs | if (_CAN_PCS) { | ||
54 | 2 | 219µs | 2 | 23µs | # spent 14µs (6+8) within constant::BEGIN@54 which was called:
# once (6µs+8µs) by Try::Tiny::ScopeGuard::BEGIN@144 at line 54 # spent 14µs making 1 call to constant::BEGIN@54
# spent 8µs making 1 call to strict::unimport |
55 | 66 | 100µs | $symtab = \%{$pkg . '::'}; | ||
56 | }; | ||||
57 | |||||
58 | 66 | 27µs | if ( $multiple ) { | ||
59 | 5 | 4µs | if (ref $_[0] ne 'HASH') { | ||
60 | require Carp; | ||||
61 | Carp::croak("Invalid reference type '".ref(shift)."' not 'HASH'"); | ||||
62 | } | ||||
63 | 5 | 1µs | $constants = shift; | ||
64 | } else { | ||||
65 | 61 | 20µs | unless (defined $_[0]) { | ||
66 | require Carp; | ||||
67 | Carp::croak("Can't use undef as constant name"); | ||||
68 | } | ||||
69 | 61 | 96µs | $constants->{+shift} = undef; | ||
70 | } | ||||
71 | |||||
72 | 66 | 127µs | foreach my $name ( keys %$constants ) { | ||
73 | # Normal constant name | ||||
74 | 93 | 814µs | 186 | 387µs | if ($name =~ $normal_constant_name and !$forbidden{$name}) { # spent 222µs making 93 calls to constant::CORE:match, avg 2µs/call
# spent 164µs making 93 calls to constant::CORE:regcomp, avg 2µs/call |
75 | # Everything is okay | ||||
76 | |||||
77 | # Name forced into main, but we're not in main. Fatal. | ||||
78 | } elsif ($forced_into_main{$name} and $pkg ne 'main') { | ||||
79 | require Carp; | ||||
80 | Carp::croak("Constant name '$name' is forced into main::"); | ||||
81 | |||||
82 | # Starts with double underscore. Fatal. | ||||
83 | } elsif ($name =~ /^__/) { | ||||
84 | require Carp; | ||||
85 | Carp::croak("Constant name '$name' begins with '__'"); | ||||
86 | |||||
87 | # Maybe the name is tolerable | ||||
88 | } elsif ($name =~ $tolerable) { | ||||
89 | # Then we'll warn only if you've asked for warnings | ||||
90 | if (warnings::enabled()) { | ||||
91 | if ($keywords{$name}) { | ||||
92 | warnings::warn("Constant name '$name' is a Perl keyword"); | ||||
93 | } elsif ($forced_into_main{$name}) { | ||||
94 | warnings::warn("Constant name '$name' is " . | ||||
95 | "forced into package main::"); | ||||
96 | } | ||||
97 | } | ||||
98 | |||||
99 | # Looks like a boolean | ||||
100 | # use constant FRED == fred; | ||||
101 | } elsif ($name =~ $boolean) { | ||||
102 | require Carp; | ||||
103 | if (@_) { | ||||
104 | Carp::croak("Constant name '$name' is invalid"); | ||||
105 | } else { | ||||
106 | Carp::croak("Constant name looks like boolean value"); | ||||
107 | } | ||||
108 | |||||
109 | } else { | ||||
110 | # Must have bad characters | ||||
111 | require Carp; | ||||
112 | Carp::croak("Constant name '$name' has invalid characters"); | ||||
113 | } | ||||
114 | |||||
115 | { | ||||
116 | 95 | 274µs | 2 | 21µs | # spent 14µs (6+7) within constant::BEGIN@116 which was called:
# once (6µs+7µs) by Try::Tiny::ScopeGuard::BEGIN@144 at line 116 # spent 14µs making 1 call to constant::BEGIN@116
# spent 7µs making 1 call to strict::unimport |
117 | 93 | 69µs | my $full_name = "${pkg}::$name"; | ||
118 | 93 | 121µs | $declared{$full_name}++; | ||
119 | 93 | 46µs | if ($multiple || @_ == 1) { | ||
120 | 93 | 33µs | my $scalar = $multiple ? $constants->{$name} : $_[0]; | ||
121 | |||||
122 | if (_DOWNGRADE) { # for 5.8 to 5.14 | ||||
123 | # Work around perl bug #31991: Sub names (actually glob | ||||
124 | # names in general) ignore the UTF8 flag. So we have to | ||||
125 | # turn it off to get the "right" symbol table entry. | ||||
126 | utf8::is_utf8 $name and utf8::encode $name; | ||||
127 | } | ||||
128 | |||||
129 | # The constant serves to optimise this entire block out on | ||||
130 | # 5.8 and earlier. | ||||
131 | 93 | 61µs | if (_CAN_PCS && $symtab && !exists $symtab->{$name}) { | ||
132 | # No typeglob yet, so we can use a reference as space- | ||||
133 | # efficient proxy for a constant subroutine | ||||
134 | # The check in Perl_ck_rvconst knows that inlinable | ||||
135 | # constants from cv_const_sv are read only. So we have to: | ||||
136 | 93 | 358µs | 93 | 77µs | Internals::SvREADONLY($scalar, 1); # spent 77µs making 93 calls to Internals::SvREADONLY, avg 826ns/call |
137 | 93 | 68µs | $symtab->{$name} = \$scalar; | ||
138 | 93 | 31µs | ++$flush_mro; | ||
139 | } else { | ||||
140 | *$full_name = sub () { $scalar }; | ||||
141 | } | ||||
142 | } elsif (@_) { | ||||
143 | my @list = @_; | ||||
144 | *$full_name = sub () { @list }; | ||||
145 | } else { | ||||
146 | *$full_name = sub () { }; | ||||
147 | } | ||||
148 | } | ||||
149 | } | ||||
150 | # Flush the cache exactly once if we make any direct symbol table changes. | ||||
151 | 66 | 619µs | 66 | 157µs | mro::method_changed_in($pkg) if _CAN_PCS && $flush_mro; # spent 157µs making 66 calls to mro::method_changed_in, avg 2µs/call |
152 | } | ||||
153 | |||||
154 | 1 | 5µs | 1; | ||
155 | |||||
156 | __END__ | ||||
# spent 222µs within constant::CORE:match which was called 93 times, avg 2µs/call:
# 93 times (222µs+0s) by constant::import at line 74, avg 2µs/call | |||||
sub constant::CORE:qr; # opcode | |||||
# spent 164µs within constant::CORE:regcomp which was called 93 times, avg 2µs/call:
# 93 times (164µs+0s) by constant::import at line 74, avg 2µs/call |