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For bin/benchmark-perlformance
  Run on Fri Apr 17 15:31:48 2015
Reported on Fri Apr 17 15:32:02 2015

Filename/home/ss5/perl5/perlbrew/perls/tapper-perl/lib/5.16.3/constant.pm
StatementsExecuted 1099 statements in 2.30ms
Subroutines
Calls P F Exclusive
Time
Inclusive
Time
Subroutine
37377944µs1.15msconstant::::importconstant::import
111165µs11.7msconstant::::BEGIN@25constant::BEGIN@25
111123µs123µsconstant::::BEGIN@36constant::BEGIN@36
561189µs89µsconstant::::CORE:matchconstant::CORE:match (opcode)
594161µs61µsconstant::::CORE:regcompconstant::CORE:regcomp (opcode)
11112µs12µsconstant::::BEGIN@2constant::BEGIN@2
11110µs26µsconstant::::BEGIN@65constant::BEGIN@65
1119µs65µsconstant::::BEGIN@4constant::BEGIN@4
1118µs18µsconstant::::BEGIN@3constant::BEGIN@3
1117µs16µsconstant::::BEGIN@127constant::BEGIN@127
1116µs16µsconstant::::BEGIN@29constant::BEGIN@29
3316µs6µsconstant::::CORE:qrconstant::CORE:qr (opcode)
1116µs29µsconstant::::BEGIN@6constant::BEGIN@6
0000s0sconstant::::__ANON__[:151]constant::__ANON__[:151]
0000s0sconstant::::__ANON__[:155]constant::__ANON__[:155]
0000s0sconstant::::__ANON__[:157]constant::__ANON__[:157]
0000s0sconstant::::__ANON__[:31]constant::__ANON__[:31]
Call graph for these subroutines as a Graphviz dot language file.
Line State
ments
Time
on line
Calls Time
in subs
Code
1package constant;
2235µs112µs
# spent 12µs within constant::BEGIN@2 which was called: # once (12µs+0s) by Getopt::Long::BEGIN@215 at line 2
use 5.005;
# spent 12µs making 1 call to constant::BEGIN@2
3220µs229µs
# spent 18µs (8+10) within constant::BEGIN@3 which was called: # once (8µs+10µs) by Getopt::Long::BEGIN@215 at line 3
use strict;
# spent 18µs making 1 call to constant::BEGIN@3 # spent 10µs making 1 call to strict::import
4221µs2122µs
# spent 65µs (9+57) within constant::BEGIN@4 which was called: # once (9µs+57µs) by Getopt::Long::BEGIN@215 at line 4
use warnings::register;
# spent 65µs making 1 call to constant::BEGIN@4 # spent 56µs making 1 call to warnings::register::import
5
6283µs252µs
# spent 29µs (6+23) within constant::BEGIN@6 which was called: # once (6µs+23µs) by Getopt::Long::BEGIN@215 at line 6
use vars qw($VERSION %declared);
# spent 29µs making 1 call to constant::BEGIN@6 # spent 23µs making 1 call to vars::import
71500ns$VERSION = '1.23';
8
9#=======================================================================
10
11# Some names are evil choices.
1215µsmy %keywords = map +($_, 1), qw{ BEGIN INIT CHECK END DESTROY AUTOLOAD };
1311µs$keywords{UNITCHECK}++ if $] > 5.009;
14
1515µsmy %forced_into_main = map +($_, 1),
16 qw{ STDIN STDOUT STDERR ARGV ARGVOUT ENV INC SIG };
17
1816µsmy %forbidden = (%keywords, %forced_into_main);
19
201600nsmy $str_end = $] >= 5.006 ? "\\z" : "\\Z";
21129µs219µsmy $normal_constant_name = qr/^_?[^\W_0-9]\w*$str_end/;
# spent 14µs making 1 call to constant::CORE:regcomp # spent 5µs making 1 call to constant::CORE:qr
2219µs25µsmy $tolerable = qr/^[A-Za-z_]\w*$str_end/;
# spent 4µs making 1 call to constant::CORE:regcomp # spent 1µs making 1 call to constant::CORE:qr
2318µs24µsmy $boolean = qr/^[01]?$str_end/;
# spent 4µs making 1 call to constant::CORE:regcomp # spent 600ns making 1 call to constant::CORE:qr
24
25
# spent 11.7ms (165µs+11.5) within constant::BEGIN@25 which was called: # once (165µs+11.5ms) by Getopt::Long::BEGIN@215 at line 45
BEGIN {
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.
292110µs225µs
# spent 16µs (6+9) within constant::BEGIN@29 which was called: # once (6µs+9µs) by Getopt::Long::BEGIN@215 at line 29
no strict 'refs';
# spent 16µs making 1 call to constant::BEGIN@29 # spent 9µs making 1 call to strict::unimport
301900ns my $const = $] > 5.009002;
3114µs *_CAN_PCS = sub () {$const};
32
33 # Before this makes its way into a dev perl release, we have to do
34 # browser-sniffing, as it were....
351200ns return unless $const;
363248µs13.18ms
# spent 123µs within constant::BEGIN@36 which was called: # once (123µs+0s) by constant::BEGIN@25 at line 45
*{chr 256} = \3;
# spent 3.18ms making 1 call to utf8::AUTOLOAD
3718µs if (exists ${__PACKAGE__."::"}{"\xc4\x80"}) {
38 delete ${__PACKAGE__."::"}{"\xc4\x80"};
39 *_DOWNGRADE = sub () {1};
40 }
41 else {
4212µs delete ${__PACKAGE__."::"}{chr 256};
4313µs *_DOWNGRADE = sub () {0};
44 }
45197µs211.8ms}
# spent 11.7ms making 1 call to constant::BEGIN@25 # spent 123µs 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 1.15ms (944µs+202µs) within constant::import which was called 37 times, avg 31µs/call: # once (166µs+40µs) by Data::DPath::Context::BEGIN@64 at line 64 of Data/DPath/Context.pm # once (83µs+20µs) by Data::DPath::Path::BEGIN@27 at line 27 of Data/DPath/Path.pm # once (50µs+11µs) by Data::DPath::Filters::BEGIN@15 at line 16 of Data/DPath/Filters.pm # once (42µs+10µs) by Getopt::Long::BEGIN@215 at line 215 of Getopt/Long.pm # once (34µs+7µs) by Sys::Info::Constants::BEGIN@24 at line 24 of Sys/Info/Constants.pm # once (33µs+7µs) by Data::Dumper::BEGIN@270 at line 270 of Data/Dumper.pm # once (23µs+5µs) by Getopt::Long::BEGIN@225 at line 225 of Getopt/Long.pm # once (21µs+5µs) by Sys::Info::Base::BEGIN@9 at line 9 of Sys/Info/Base.pm # once (22µs+2µs) by Sys::Info::Constants::BEGIN@36 at line 36 of Sys/Info/Constants.pm # once (20µs+4µs) by Sys::Info::Constants::BEGIN@32 at line 32 of Sys/Info/Constants.pm # once (19µs+4µs) by Sys::Info::Constants::BEGIN@25 at line 25 of Sys/Info/Constants.pm # once (18µs+4µs) by Getopt::Long::BEGIN@244 at line 244 of Getopt/Long.pm # once (20µs+2µs) by Sys::Info::Constants::BEGIN@27 at line 27 of Sys/Info/Constants.pm # once (18µs+4µs) by Sys::Info::Constants::BEGIN@26 at line 26 of Sys/Info/Constants.pm # once (18µs+4µs) by Sys::Info::Base::BEGIN@12 at line 12 of Sys/Info/Base.pm # once (18µs+4µs) by Sys::Info::Constants::BEGIN@30 at line 30 of Sys/Info/Constants.pm # once (17µs+4µs) by Sys::Info::Constants::BEGIN@29 at line 29 of Sys/Info/Constants.pm # once (17µs+4µs) by Getopt::Long::BEGIN@227 at line 227 of Getopt/Long.pm # once (16µs+4µs) by Sys::Info::Constants::BEGIN@41 at line 41 of Sys/Info/Constants.pm # once (16µs+4µs) by Sys::Info::Constants::BEGIN@37 at line 37 of Sys/Info/Constants.pm # once (16µs+4µs) by Sys::Info::Constants::BEGIN@46 at line 46 of Sys/Info/Constants.pm # once (16µs+4µs) by Sys::Info::Constants::BEGIN@44 at line 44 of Sys/Info/Constants.pm # once (16µs+4µs) by Sys::Info::Constants::BEGIN@34 at line 34 of Sys/Info/Constants.pm # once (16µs+4µs) by Sys::Info::Constants::BEGIN@35 at line 35 of Sys/Info/Constants.pm # once (16µs+3µs) by Sys::Info::Constants::BEGIN@42 at line 42 of Sys/Info/Constants.pm # once (16µs+4µs) by Getopt::Long::BEGIN@254 at line 254 of Getopt/Long.pm # once (16µs+3µs) by Getopt::Long::BEGIN@229 at line 229 of Getopt/Long.pm # once (17µs+2µs) by Sys::Info::Constants::BEGIN@39 at line 39 of Sys/Info/Constants.pm # once (16µs+4µs) by Getopt::Long::BEGIN@231 at line 231 of Getopt/Long.pm # once (16µs+3µs) by Getopt::Long::BEGIN@233 at line 233 of Getopt/Long.pm # once (16µs+3µs) by Getopt::Long::BEGIN@230 at line 230 of Getopt/Long.pm # once (16µs+3µs) by Sys::Info::Constants::BEGIN@48 at line 48 of Sys/Info/Constants.pm # once (16µs+3µs) by Getopt::Long::BEGIN@235 at line 235 of Getopt/Long.pm # once (16µs+3µs) by Getopt::Long::BEGIN@243 at line 243 of Getopt/Long.pm # once (15µs+3µs) by Getopt::Long::BEGIN@232 at line 232 of Getopt/Long.pm # once (16µs+3µs) by Getopt::Long::BEGIN@236 at line 236 of Getopt/Long.pm # once (16µs+2µs) by Sys::Info::Constants::BEGIN@40 at line 40 of Sys/Info/Constants.pm
sub import {
563714µs my $class = shift;
57379µs return unless @_; # Ignore 'use constant;'
58374µs my $constants;
593712µs my $multiple = ref $_[0];
603717µs my $pkg = caller;
61374µs my $flush_mro;
62373µs my $symtab;
63
643713µs if (_CAN_PCS) {
652195µs242µs
# spent 26µs (10+16) within constant::BEGIN@65 which was called: # once (10µs+16µs) by Getopt::Long::BEGIN@215 at line 65
no strict 'refs';
# spent 26µs making 1 call to constant::BEGIN@65 # spent 16µs making 1 call to strict::unimport
663741µs $symtab = \%{$pkg . '::'};
67 };
68
69379µs if ( $multiple ) {
7033µs if (ref $_[0] ne 'HASH') {
71 require Carp;
72 Carp::croak("Invalid reference type '".ref(shift)."' not 'HASH'");
73 }
7432µs $constants = shift;
75 } else {
76347µs unless (defined $_[0]) {
77 require Carp;
78 Carp::croak("Can't use undef as constant name");
79 }
803431µs $constants->{+shift} = undef;
81 }
82
833749µs foreach my $name ( keys %$constants ) {
84 # Normal constant name
8556347µs112129µs if ($name =~ $normal_constant_name and !$forbidden{$name}) {
# spent 89µs making 56 calls to constant::CORE:match, avg 2µs/call # spent 40µs making 56 calls to constant::CORE:regcomp, avg 705ns/call
86 # Everything is okay
87
88 # Name forced into main, but we're not in main. Fatal.
89 } elsif ($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 {
12758225µs225µs
# spent 16µs (7+9) within constant::BEGIN@127 which was called: # once (7µs+9µs) by Getopt::Long::BEGIN@215 at line 127
no strict 'refs';
# spent 16µs making 1 call to constant::BEGIN@127 # spent 9µs making 1 call to strict::unimport
1285635µs my $full_name = "${pkg}::$name";
1295654µs $declared{$full_name}++;
1305631µs if ($multiple || @_ == 1) {
1315224µs 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.
1425236µs 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:
14752143µs5238µs Internals::SvREADONLY($scalar, 1);
# spent 38µs making 52 calls to Internals::SvREADONLY, avg 733ns/call
1485235µs $symtab->{$name} = \$scalar;
1495215µs ++$flush_mro;
150 } else {
151 *$full_name = sub () { $scalar };
152 }
153 } elsif (@_) {
15449µs my @list = @_;
155415µs *$full_name = sub () { @list };
156 } else {
157 *$full_name = sub () { };
158 }
159 }
160 }
161 # Flush the cache exactly once if we make any direct symbol table changes.
16237215µs3335µs mro::method_changed_in($pkg) if _CAN_PCS && $flush_mro;
# spent 35µs making 33 calls to mro::method_changed_in, avg 1µs/call
163}
164
16518µs1;
166
167__END__
 
# spent 89µs within constant::CORE:match which was called 56 times, avg 2µs/call: # 56 times (89µs+0s) by constant::import at line 85, avg 2µs/call
sub constant::CORE:match; # opcode
# spent 6µs within constant::CORE:qr which was called 3 times, avg 2µs/call: # once (5µs+0s) by Getopt::Long::BEGIN@215 at line 21 # once (1µs+0s) by Getopt::Long::BEGIN@215 at line 22 # once (600ns+0s) by Getopt::Long::BEGIN@215 at line 23
sub constant::CORE:qr; # opcode
# spent 61µs within constant::CORE:regcomp which was called 59 times, avg 1µs/call: # 56 times (40µs+0s) by constant::import at line 85, avg 705ns/call # once (14µs+0s) by Getopt::Long::BEGIN@215 at line 21 # once (4µs+0s) by Getopt::Long::BEGIN@215 at line 22 # once (4µs+0s) by Getopt::Long::BEGIN@215 at line 23
sub constant::CORE:regcomp; # opcode