Filename | /Users/ap13/perl5/perlbrew/perls/perl-5.16.2/lib/5.16.2/constant.pm |
Statements | Executed 777 statements in 3.05ms |
Calls | P | F | Exclusive Time |
Inclusive Time |
Subroutine |
---|---|---|---|---|---|
31 | 31 | 10 | 840µs | 1.04ms | import | constant::
1 | 1 | 1 | 358µs | 358µs | BEGIN@36 | constant::
1 | 1 | 1 | 296µs | 21.6ms | BEGIN@25 | constant::
34 | 4 | 1 | 76µs | 76µs | CORE:regcomp (opcode) | constant::
31 | 1 | 1 | 70µs | 70µs | CORE:match (opcode) | constant::
1 | 1 | 1 | 32µs | 32µs | BEGIN@2 | constant::
1 | 1 | 1 | 15µs | 198µs | BEGIN@4 | constant::
1 | 1 | 1 | 15µs | 78µs | BEGIN@6 | constant::
1 | 1 | 1 | 14µs | 35µs | BEGIN@29 | constant::
1 | 1 | 1 | 13µs | 42µs | BEGIN@3 | constant::
1 | 1 | 1 | 13µs | 32µs | BEGIN@65 | constant::
1 | 1 | 1 | 8µs | 20µs | BEGIN@127 | constant::
3 | 3 | 1 | 5µs | 5µs | CORE:qr (opcode) | constant::
0 | 0 | 0 | 0s | 0s | __ANON__[:151] | constant::
0 | 0 | 0 | 0s | 0s | __ANON__[:155] | constant::
0 | 0 | 0 | 0s | 0s | __ANON__[:157] | constant::
0 | 0 | 0 | 0s | 0s | __ANON__[:31] | constant::
Line | State ments |
Time on line |
Calls | Time in subs |
Code |
---|---|---|---|---|---|
1 | package constant; | ||||
2 | 2 | 88µs | 1 | 32µs | # spent 32µs within constant::BEGIN@2 which was called:
# once (32µs+0s) by Try::Tiny::ScopeGuard::BEGIN@144 at line 2 # spent 32µs making 1 call to constant::BEGIN@2 |
3 | 2 | 40µs | 2 | 71µs | # spent 42µs (13+29) within constant::BEGIN@3 which was called:
# once (13µs+29µs) by Try::Tiny::ScopeGuard::BEGIN@144 at line 3 # spent 42µs making 1 call to constant::BEGIN@3
# spent 29µs making 1 call to strict::import |
4 | 2 | 49µs | 2 | 382µs | # spent 198µs (15+183) within constant::BEGIN@4 which was called:
# once (15µs+183µs) by Try::Tiny::ScopeGuard::BEGIN@144 at line 4 # spent 198µs making 1 call to constant::BEGIN@4
# spent 183µs making 1 call to warnings::register::import |
5 | |||||
6 | 2 | 222µs | 2 | 140µs | # spent 78µs (15+63) within constant::BEGIN@6 which was called:
# once (15µs+63µs) by Try::Tiny::ScopeGuard::BEGIN@144 at line 6 # spent 78µs making 1 call to constant::BEGIN@6
# spent 63µs making 1 call to vars::import |
7 | 1 | 800ns | $VERSION = '1.23'; | ||
8 | |||||
9 | #======================================================================= | ||||
10 | |||||
11 | # Some names are evil choices. | ||||
12 | 1 | 8µs | my %keywords = map +($_, 1), qw{ BEGIN INIT CHECK END DESTROY AUTOLOAD }; | ||
13 | 1 | 2µs | $keywords{UNITCHECK}++ if $] > 5.009; | ||
14 | |||||
15 | 1 | 7µs | my %forced_into_main = map +($_, 1), | ||
16 | qw{ STDIN STDOUT STDERR ARGV ARGVOUT ENV INC SIG }; | ||||
17 | |||||
18 | 1 | 6µs | my %forbidden = (%keywords, %forced_into_main); | ||
19 | |||||
20 | 1 | 700ns | my $str_end = $] >= 5.006 ? "\\z" : "\\Z"; | ||
21 | 1 | 30µs | 2 | 19µs | my $normal_constant_name = qr/^_?[^\W_0-9]\w*$str_end/; # spent 16µs making 1 call to constant::CORE:regcomp
# spent 3µs making 1 call to constant::CORE:qr |
22 | 1 | 11µs | 2 | 6µs | my $tolerable = qr/^[A-Za-z_]\w*$str_end/; # spent 5µs making 1 call to constant::CORE:regcomp
# spent 1µs making 1 call to constant::CORE:qr |
23 | 1 | 10µs | 2 | 6µs | my $boolean = qr/^[01]?$str_end/; # spent 5µs making 1 call to constant::CORE:regcomp
# spent 900ns making 1 call to constant::CORE:qr |
24 | |||||
25 | # spent 21.6ms (296µs+21.3) within constant::BEGIN@25 which was called:
# once (296µs+21.3ms) by Try::Tiny::ScopeGuard::BEGIN@144 at line 45 | ||||
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 | 2 | 251µs | 2 | 57µs | # spent 35µs (14+22) within constant::BEGIN@29 which was called:
# once (14µs+22µs) by Try::Tiny::ScopeGuard::BEGIN@144 at line 29 # spent 35µs making 1 call to constant::BEGIN@29
# spent 22µs making 1 call to strict::unimport |
30 | 5 | 57µs | my $const = $] > 5.009002; | ||
31 | *_CAN_PCS = sub () {$const}; | ||||
32 | |||||
33 | # Before this makes its way into a dev perl release, we have to do | ||||
34 | # browser-sniffing, as it were.... | ||||
35 | return unless $const; | ||||
36 | 2 | 548µs | 1 | 4.96ms | # spent 358µs within constant::BEGIN@36 which was called:
# once (358µs+0s) by constant::BEGIN@25 at line 45 # spent 4.96ms making 1 call to utf8::AUTOLOAD |
37 | 2 | 6µs | if (exists ${__PACKAGE__."::"}{"\xc4\x80"}) { | ||
38 | delete ${__PACKAGE__."::"}{"\xc4\x80"}; | ||||
39 | *_DOWNGRADE = sub () {1}; | ||||
40 | } | ||||
41 | else { | ||||
42 | delete ${__PACKAGE__."::"}{chr 256}; | ||||
43 | *_DOWNGRADE = sub () {0}; | ||||
44 | } | ||||
45 | 1 | 125µs | 2 | 21.9ms | } # spent 21.6ms making 1 call to constant::BEGIN@25
# spent 358µs making 1 call to constant::BEGIN@36 |
46 | |||||
47 | #======================================================================= | ||||
48 | # import() - import symbols into user's namespace | ||||
49 | # | ||||
50 | # What we actually do is define a function in the caller's namespace | ||||
51 | # which returns the value. The function we create will normally | ||||
52 | # be inlined as a constant, thereby avoiding further sub calling | ||||
53 | # overhead. | ||||
54 | #======================================================================= | ||||
55 | # spent 1.04ms (840µs+198µs) within constant::import which was called 31 times, avg 33µs/call:
# once (63µs+15µs) by Class::MOP::Mixin::HasOverloads::BEGIN@50 at line 50 of Class/MOP/Mixin/HasOverloads.pm
# once (41µs+12µs) by Bio::Tools::CodonTable::BEGIN@199 at line 199 of Bio/Tools/CodonTable.pm
# once (38µs+14µs) by Try::Tiny::ScopeGuard::BEGIN@144 at line 144 of Try/Tiny.pm
# once (43µs+9µs) by File::Spec::Unix::BEGIN@127 at line 127 of File/Spec/Unix.pm
# once (39µs+12µs) by File::Temp::BEGIN@84 at line 84 of File/Temp.pm
# once (36µs+15µs) by Class::MOP::Method::Meta::BEGIN@10 at line 10 of Class/MOP/Method/Meta.pm
# once (42µs+9µs) by Getopt::Long::BEGIN@219 at line 219 of Getopt/Long.pm
# once (40µs+8µs) by Data::Dumper::BEGIN@272 at line 272 of Data/Dumper.pm
# once (39µs+8µs) by Moose::Meta::Role::Application::ToInstance::BEGIN@19 at line 19 of Moose/Meta/Role/Application/ToInstance.pm
# once (38µs+8µs) by Text::Glob::BEGIN@13 at line 13 of Text/Glob.pm
# once (24µs+5µs) by File::Spec::Unix::BEGIN@242 at line 242 of File/Spec/Unix.pm
# once (23µs+5µs) by File::Spec::Unix::BEGIN@220 at line 220 of File/Spec/Unix.pm
# once (23µs+4µs) by Getopt::Long::BEGIN@231 at line 231 of Getopt/Long.pm
# once (22µs+5µs) by File::Spec::Unix::BEGIN@136 at line 136 of File/Spec/Unix.pm
# once (23µs+4µs) by Getopt::Long::BEGIN@248 at line 257 of Getopt/Long.pm
# once (21µs+5µs) by Getopt::Long::BEGIN@229 at line 229 of Getopt/Long.pm
# once (21µs+4µs) by File::Temp::BEGIN@87 at line 87 of File/Temp.pm
# once (20µs+5µs) by Getopt::Long::BEGIN@235 at line 235 of Getopt/Long.pm
# once (20µs+4µs) by File::Temp::BEGIN@91 at line 91 of File/Temp.pm
# once (20µs+4µs) by File::Spec::Unix::BEGIN@145 at line 145 of File/Spec/Unix.pm
# once (19µs+4µs) by Getopt::Long::BEGIN@233 at line 233 of Getopt/Long.pm
# once (19µs+4µs) by File::Temp::BEGIN@95 at line 95 of File/Temp.pm
# once (19µs+4µs) by Getopt::Long::BEGIN@236 at line 236 of Getopt/Long.pm
# once (19µs+4µs) by File::Temp::BEGIN@96 at line 96 of File/Temp.pm
# once (19µs+4µs) by Getopt::Long::BEGIN@234 at line 234 of Getopt/Long.pm
# once (19µs+4µs) by Getopt::Long::BEGIN@258 at line 258 of Getopt/Long.pm
# once (18µs+4µs) by File::Temp::BEGIN@97 at line 97 of File/Temp.pm
# once (18µs+4µs) by Getopt::Long::BEGIN@239 at line 239 of Getopt/Long.pm
# once (18µs+4µs) by Getopt::Long::BEGIN@237 at line 237 of Getopt/Long.pm
# once (18µs+4µs) by Getopt::Long::BEGIN@240 at line 240 of Getopt/Long.pm
# once (18µs+4µs) by Getopt::Long::BEGIN@247 at line 247 of Getopt/Long.pm | ||||
56 | 341 | 370µs | my $class = shift; | ||
57 | return unless @_; # Ignore 'use constant;' | ||||
58 | my $constants; | ||||
59 | my $multiple = ref $_[0]; | ||||
60 | my $pkg = caller; | ||||
61 | my $flush_mro; | ||||
62 | my $symtab; | ||||
63 | |||||
64 | 31 | 39µs | if (_CAN_PCS) { | ||
65 | 2 | 299µs | 2 | 52µs | # spent 32µs (13+19) within constant::BEGIN@65 which was called:
# once (13µs+19µs) by Try::Tiny::ScopeGuard::BEGIN@144 at line 65 # spent 32µs making 1 call to constant::BEGIN@65
# spent 19µs making 1 call to strict::unimport |
66 | $symtab = \%{$pkg . '::'}; | ||||
67 | }; | ||||
68 | |||||
69 | 62 | 51µs | if ( $multiple ) { | ||
70 | if (ref $_[0] ne 'HASH') { | ||||
71 | require Carp; | ||||
72 | Carp::croak("Invalid reference type '".ref(shift)."' not 'HASH'"); | ||||
73 | } | ||||
74 | $constants = shift; | ||||
75 | } else { | ||||
76 | unless (defined $_[0]) { | ||||
77 | require Carp; | ||||
78 | Carp::croak("Can't use undef as constant name"); | ||||
79 | } | ||||
80 | $constants->{+shift} = undef; | ||||
81 | } | ||||
82 | |||||
83 | foreach my $name ( keys %$constants ) { | ||||
84 | # Normal constant name | ||||
85 | 62 | 293µs | 62 | 121µs | if ($name =~ $normal_constant_name and !$forbidden{$name}) { # spent 70µs making 31 calls to constant::CORE:match, avg 2µs/call
# spent 51µs making 31 calls to constant::CORE:regcomp, avg 2µs/call |
86 | # Everything is okay | ||||
87 | |||||
88 | # Name forced into main, but we're not in main. Fatal. | ||||
89 | } elsif ($forced_into_main{$name} and $pkg ne 'main') { | ||||
90 | require Carp; | ||||
91 | Carp::croak("Constant name '$name' is forced into main::"); | ||||
92 | |||||
93 | # Starts with double underscore. Fatal. | ||||
94 | } elsif ($name =~ /^__/) { | ||||
95 | require Carp; | ||||
96 | Carp::croak("Constant name '$name' begins with '__'"); | ||||
97 | |||||
98 | # Maybe the name is tolerable | ||||
99 | } elsif ($name =~ $tolerable) { | ||||
100 | # Then we'll warn only if you've asked for warnings | ||||
101 | if (warnings::enabled()) { | ||||
102 | if ($keywords{$name}) { | ||||
103 | warnings::warn("Constant name '$name' is a Perl keyword"); | ||||
104 | } elsif ($forced_into_main{$name}) { | ||||
105 | warnings::warn("Constant name '$name' is " . | ||||
106 | "forced into package main::"); | ||||
107 | } | ||||
108 | } | ||||
109 | |||||
110 | # Looks like a boolean | ||||
111 | # use constant FRED == fred; | ||||
112 | } elsif ($name =~ $boolean) { | ||||
113 | require Carp; | ||||
114 | if (@_) { | ||||
115 | Carp::croak("Constant name '$name' is invalid"); | ||||
116 | } else { | ||||
117 | Carp::croak("Constant name looks like boolean value"); | ||||
118 | } | ||||
119 | |||||
120 | } else { | ||||
121 | # Must have bad characters | ||||
122 | require Carp; | ||||
123 | Carp::croak("Constant name '$name' has invalid characters"); | ||||
124 | } | ||||
125 | |||||
126 | { | ||||
127 | 2 | 259µs | 2 | 31µs | # spent 20µs (8+12) within constant::BEGIN@127 which was called:
# once (8µs+12µs) by Try::Tiny::ScopeGuard::BEGIN@144 at line 127 # spent 20µs making 1 call to constant::BEGIN@127
# spent 12µs making 1 call to strict::unimport |
128 | 93 | 81µs | my $full_name = "${pkg}::$name"; | ||
129 | $declared{$full_name}++; | ||||
130 | 62 | 38µs | if ($multiple || @_ == 1) { | ||
131 | my $scalar = $multiple ? $constants->{$name} : $_[0]; | ||||
132 | |||||
133 | if (_DOWNGRADE) { # for 5.10 to 5.14 | ||||
134 | # Work around perl bug #31991: Sub names (actually glob | ||||
135 | # names in general) ignore the UTF8 flag. So we have to | ||||
136 | # turn it off to get the "right" symbol table entry. | ||||
137 | utf8::is_utf8 $name and utf8::encode $name; | ||||
138 | } | ||||
139 | |||||
140 | # The constant serves to optimise this entire block out on | ||||
141 | # 5.8 and earlier. | ||||
142 | 93 | 138µs | if (_CAN_PCS && $symtab && !exists $symtab->{$name}) { | ||
143 | # No typeglob yet, so we can use a reference as space- | ||||
144 | # efficient proxy for a constant subroutine | ||||
145 | # The check in Perl_ck_rvconst knows that inlinable | ||||
146 | # constants from cv_const_sv are read only. So we have to: | ||||
147 | 31 | 37µs | Internals::SvREADONLY($scalar, 1); # spent 37µs making 31 calls to Internals::SvREADONLY, avg 1µs/call | ||
148 | $symtab->{$name} = \$scalar; | ||||
149 | ++$flush_mro; | ||||
150 | } else { | ||||
151 | *$full_name = sub () { $scalar }; | ||||
152 | } | ||||
153 | } elsif (@_) { | ||||
154 | my @list = @_; | ||||
155 | *$full_name = sub () { @list }; | ||||
156 | } else { | ||||
157 | *$full_name = sub () { }; | ||||
158 | } | ||||
159 | } | ||||
160 | } | ||||
161 | # Flush the cache exactly once if we make any direct symbol table changes. | ||||
162 | 31 | 40µs | mro::method_changed_in($pkg) if _CAN_PCS && $flush_mro; # spent 40µs making 31 calls to mro::method_changed_in, avg 1µs/call | ||
163 | } | ||||
164 | |||||
165 | 1 | 20µs | 1; | ||
166 | |||||
167 | __END__ | ||||
# spent 70µs within constant::CORE:match which was called 31 times, avg 2µs/call:
# 31 times (70µs+0s) by constant::import at line 85, avg 2µs/call | |||||
sub constant::CORE:qr; # opcode | |||||
# spent 76µs within constant::CORE:regcomp which was called 34 times, avg 2µs/call:
# 31 times (51µs+0s) by constant::import at line 85, avg 2µs/call
# once (16µs+0s) by Try::Tiny::ScopeGuard::BEGIN@144 at line 21
# once (5µs+0s) by Try::Tiny::ScopeGuard::BEGIN@144 at line 22
# once (5µs+0s) by Try::Tiny::ScopeGuard::BEGIN@144 at line 23 |