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For bin/dpath
  Run on Tue Jun 5 15:31:33 2012
Reported on Tue Jun 5 15:31:38 2012

Filename/home/ss5/perl5/perlbrew/perls/perl-5.14.1/lib/5.14.1/constant.pm
StatementsExecuted 310 statements in 5.73ms
Subroutines
Calls P F Exclusive
Time
Inclusive
Time
Subroutine
3331.23ms1.64msconstant::::importconstant::import
2541180µs180µsconstant::::CORE:regcompconstant::CORE:regcomp (opcode)
2211149µs149µsconstant::::CORE:matchconstant::CORE:match (opcode)
11188µs88µsconstant::::BEGIN@2constant::BEGIN@2
33179µs79µsconstant::::CORE:qrconstant::CORE:qr (opcode)
11148µs48µsconstant::::BEGIN@25constant::BEGIN@25
11132µs67µsconstant::::BEGIN@52constant::BEGIN@52
11130µs71µsconstant::::BEGIN@114constant::BEGIN@114
11128µs75µsconstant::::BEGIN@29constant::BEGIN@29
11128µs449µsconstant::::BEGIN@4constant::BEGIN@4
11127µs172µsconstant::::BEGIN@6constant::BEGIN@6
11127µs41µsconstant::::BEGIN@3constant::BEGIN@3
0000s0sconstant::::__ANON__[:136]constant::__ANON__[:136]
0000s0sconstant::::__ANON__[:140]constant::__ANON__[:140]
0000s0sconstant::::__ANON__[:142]constant::__ANON__[:142]
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;
22178µs188µs
# spent 88µs within constant::BEGIN@2 which was called: # once (88µs+0s) by Data::DPath::Filters::BEGIN@15 at line 2
use 5.005;
# spent 88µs making 1 call to constant::BEGIN@2
3286µs255µs
# spent 41µs (27+14) within constant::BEGIN@3 which was called: # once (27µs+14µs) by Data::DPath::Filters::BEGIN@15 at line 3
use strict;
# spent 41µs making 1 call to constant::BEGIN@3 # spent 14µs making 1 call to strict::import
42162µs2870µs
# spent 449µs (28+421) within constant::BEGIN@4 which was called: # once (28µs+421µs) by Data::DPath::Filters::BEGIN@15 at line 4
use warnings::register;
# spent 449µs making 1 call to constant::BEGIN@4 # spent 421µs making 1 call to warnings::register::import
5
62554µs2316µs
# spent 172µs (27+144) within constant::BEGIN@6 which was called: # once (27µs+144µs) by Data::DPath::Filters::BEGIN@15 at line 6
use vars qw($VERSION %declared);
# spent 172µs making 1 call to constant::BEGIN@6 # spent 144µs making 1 call to vars::import
712µs$VERSION = '1.21';
8
9#=======================================================================
10
11# Some names are evil choices.
12123µsmy %keywords = map +($_, 1), qw{ BEGIN INIT CHECK END DESTROY AUTOLOAD };
1316µs$keywords{UNITCHECK}++ if $] > 5.009;
14
15122µsmy %forced_into_main = map +($_, 1),
16 qw{ STDIN STDOUT STDERR ARGV ARGVOUT ENV INC SIG };
17
18121µsmy %forbidden = (%keywords, %forced_into_main);
19
2013µsmy $str_end = $] >= 5.006 ? "\\z" : "\\Z";
211170µs2131µsmy $normal_constant_name = qr/^_?[^\W_0-9]\w*$str_end/;
# spent 69µs making 1 call to constant::CORE:qr # spent 62µs making 1 call to constant::CORE:regcomp
22145µs226µsmy $tolerable = qr/^[A-Za-z_]\w*$str_end/;
# spent 20µs making 1 call to constant::CORE:regcomp # spent 6µs making 1 call to constant::CORE:qr
23141µs224µsmy $boolean = qr/^[01]?$str_end/;
# spent 20µs making 1 call to constant::CORE:regcomp # spent 5µs making 1 call to constant::CORE:qr
24
25
# spent 48µs within constant::BEGIN@25 which was called: # once (48µs+0s) by Data::DPath::Filters::BEGIN@15 at line 32
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.
292193µs2122µs
# spent 75µs (28+47) within constant::BEGIN@29 which was called: # once (28µs+47µs) by Data::DPath::Filters::BEGIN@15 at line 29
no strict 'refs';
# spent 75µs making 1 call to constant::BEGIN@29 # spent 47µs making 1 call to strict::unimport
30250µs my $const = $] > 5.009002;
31 *_CAN_PCS = sub () {$const};
321264µs148µs}
# spent 48µs 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 1.64ms (1.23+414µs) within constant::import which was called 3 times, avg 547µs/call: # once (550µs+190µs) by Data::DPath::Context::BEGIN@64 at line 64 of Data/DPath/Context.pm # once (429µs+141µs) by Data::DPath::Path::BEGIN@27 at line 27 of Data/DPath/Path.pm # once (249µs+82µs) by Data::DPath::Filters::BEGIN@15 at line 16 of Data/DPath/Filters.pm
sub import {
432841.66ms my $class = shift;
44 return unless @_; # Ignore 'use constant;'
45 my $constants;
46 my $multiple = ref $_[0];
47 my $pkg = caller;
48 my $flush_mro;
49 my $symtab;
50
51 if (_CAN_PCS) {
5221.21ms2103µs
# spent 67µs (32+35) within constant::BEGIN@52 which was called: # once (32µs+35µs) by Data::DPath::Filters::BEGIN@15 at line 52
no strict 'refs';
# spent 67µs making 1 call to constant::BEGIN@52 # spent 35µs making 1 call to strict::unimport
53 $symtab = \%{$pkg . '::'};
54 };
55
56 if ( $multiple ) {
57 if (ref $_[0] ne 'HASH') {
58 require Carp;
59 Carp::croak("Invalid reference type '".ref(shift)."' not 'HASH'");
60 }
61 $constants = shift;
62 } else {
63 unless (defined $_[0]) {
64 require Carp;
65 Carp::croak("Can't use undef as constant name");
66 }
67 $constants->{+shift} = undef;
68 }
69
70 foreach my $name ( keys %$constants ) {
71 # Normal constant name
7244228µs if ($name =~ $normal_constant_name and !$forbidden{$name}) {
# spent 149µs making 22 calls to constant::CORE:match, avg 7µs/call # spent 78µs making 22 calls to constant::CORE:regcomp, avg 4µs/call
73 # Everything is okay
74
75 # Name forced into main, but we're not in main. Fatal.
76 } elsif ($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 {
1142994µs2112µs
# spent 71µs (30+41) within constant::BEGIN@114 which was called: # once (30µs+41µs) by Data::DPath::Filters::BEGIN@15 at line 114
no strict 'refs';
# spent 71µs making 1 call to constant::BEGIN@114 # spent 41µs making 1 call to strict::unimport
115 my $full_name = "${pkg}::$name";
116 $declared{$full_name}++;
117 if ($multiple || @_ == 1) {
118 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.
1232280µs utf8::is_utf8 $name and utf8::encode $name;
# spent 80µs making 22 calls to utf8::is_utf8, avg 4µs/call
124
125 # The constant serves to optimise this entire block out on
126 # 5.8 and earlier.
127 if (_CAN_PCS && $symtab && !exists $symtab->{$name}) {
128 # No typeglob yet, so we can use a reference as space-
129 # efficient proxy for a constant subroutine
130 # The check in Perl_ck_rvconst knows that inlinable
131 # constants from cv_const_sv are read only. So we have to:
1322282µs Internals::SvREADONLY($scalar, 1);
# spent 82µs making 22 calls to Internals::SvREADONLY, avg 4µs/call
133 $symtab->{$name} = \$scalar;
134 ++$flush_mro;
135 } else {
136 *$full_name = sub () { $scalar };
137 }
138 } elsif (@_) {
139 my @list = @_;
140 *$full_name = sub () { @list };
141 } else {
142 *$full_name = sub () { };
143 }
144 }
145 }
146 # Flush the cache exactly once if we make any direct symbol table changes.
147324µs mro::method_changed_in($pkg) if _CAN_PCS && $flush_mro;
# spent 24µs making 3 calls to mro::method_changed_in, avg 8µs/call
148}
149
150145µs1;
151
152__END__
 
# spent 149µs within constant::CORE:match which was called 22 times, avg 7µs/call: # 22 times (149µs+0s) by constant::import at line 72, avg 7µs/call
sub constant::CORE:match; # opcode
# spent 79µs within constant::CORE:qr which was called 3 times, avg 26µs/call: # once (69µs+0s) by Data::DPath::Filters::BEGIN@15 at line 21 # once (6µs+0s) by Data::DPath::Filters::BEGIN@15 at line 22 # once (5µs+0s) by Data::DPath::Filters::BEGIN@15 at line 23
sub constant::CORE:qr; # opcode
# spent 180µs within constant::CORE:regcomp which was called 25 times, avg 7µs/call: # 22 times (78µs+0s) by constant::import at line 72, avg 4µs/call # once (62µs+0s) by Data::DPath::Filters::BEGIN@15 at line 21 # once (20µs+0s) by Data::DPath::Filters::BEGIN@15 at line 22 # once (20µs+0s) by Data::DPath::Filters::BEGIN@15 at line 23
sub constant::CORE:regcomp; # opcode