Profile of constant.pm

← Index
NYTProf Performance Profile «line view»
For script/ponapi
Run on Wed Feb 10 15:51:26 2016
Reported on Thu Feb 11 09:43:09 2016

Filename | /usr/share/perl/5.18/constant.pm
Statements | Executed 1881 statements in 3.68ms

Subroutines
Calls | P | F | Exclusive Time | Inclusive Time | Subroutine
--- | --- | --- | --- | --- | ---
66 | 66 | 24 | 2.05ms | 2.67ms | constant::::importconstant::import
93 | 1 | 1 | 222µs | 222µs | constant::::CORE:matchconstant::CORE:match (opcode)
93 | 1 | 1 | 164µs | 164µs | constant::::CORE:regcompconstant::CORE:regcomp (opcode)
1 | 1 | 1 | 13µs | 13µs | constant::::BEGIN@24constant::BEGIN@24
1 | 1 | 1 | 12µs | 12µs | constant::::BEGIN@2constant::BEGIN@2
1 | 1 | 1 | 8µs | 16µs | constant::::BEGIN@28constant::BEGIN@28
1 | 1 | 1 | 6µs | 14µs | constant::::BEGIN@116constant::BEGIN@116
1 | 1 | 1 | 6µs | 33µs | constant::::BEGIN@6constant::BEGIN@6
1 | 1 | 1 | 6µs | 14µs | constant::::BEGIN@54constant::BEGIN@54
1 | 1 | 1 | 6µs | 72µs | constant::::BEGIN@4constant::BEGIN@4
1 | 1 | 1 | 5µs | 14µs | constant::::BEGIN@3constant::BEGIN@3
3 | 3 | 1 | 3µs | 3µs | constant::::CORE:qrconstant::CORE:qr (opcode)
0 | 0 | 0 | 0s | 0s | constant::::__ANON__[:140]constant::__ANON__[:140]
0 | 0 | 0 | 0s | 0s | constant::::__ANON__[:144]constant::__ANON__[:144]
0 | 0 | 0 | 0s | 0s | constant::::__ANON__[:146]constant::__ANON__[:146]
0 | 0 | 0 | 0s | 0s | constant::::__ANON__[:30]constant::__ANON__[:30]
0 | 0 | 0 | 0s | 0s | constant::::__ANON__[:33]constant::__ANON__[:33]

Call graph for these subroutines as a Graphviz dot language file.

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 use 5.008; # 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 use strict; # 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 use warnings::register; # 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 use vars qw($VERSION %declared); # 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 BEGIN {
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 no strict 'refs'; # 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 sub import {
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 no strict 'refs'; # 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 no strict 'refs'; # 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:match; # opcode
|  |  |  |  | # spent 3µs within constant::CORE:qr which was called 3 times, avg 1µs/call: # once (2µs+0s) by Try::Tiny::ScopeGuard::BEGIN@144 at line 20 # once (700ns+0s) by Try::Tiny::ScopeGuard::BEGIN@144 at line 21 # once (500ns+0s) by Try::Tiny::ScopeGuard::BEGIN@144 at line 22 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 sub constant::CORE:regcomp; # opcode