← Index
NYTProf Performance Profile   « block view • line view • sub view »
For ddd2.pl
  Run on Tue May 25 16:52:24 2010
Reported on Tue May 25 16:56:49 2010

File /usr/local/lib/perl5/5.8.8/strict.pm
Statements Executed 632
Statement Execution Time 8.96ms
Subroutines — ordered by exclusive time
Calls P F Exclusive
Time		 Inclusive
Time		 Subroutine
106106972.85ms3.03msstrict::::importstrict::import
46312.70ms2.70msstrict::::bitsstrict::bits
4343261.89ms4.31msstrict::::unimportstrict::unimport
Call graph for these subroutines as a Graphviz dot language file.
Line State
ments		 Time
on line		 Calls Time
in subs		 Code
1package strict;
2
318µs$strict::VERSION = "1.03";
4
5118µsmy %bitmask = (
6refs => 0x00000002,
7subs => 0x00000200,
8vars => 0x00000400
9);
10
11
# spent 2.70ms within strict::bits which was called 46 times, avg 59µs/call: # 42 times (2.42ms+0s) by strict::unimport at line 34, avg 58µs/call # 3 times (181µs+0s) by strict::import at line 29, avg 60µs/call # once (99µs+0s) by base::BEGIN at line 25
sub bits {
123303.11ms my $bits = 0;
13 my @wrong;
14 foreach my $s (@_) {
15 push @wrong, $s unless exists $bitmask{$s};
16 $bits |= $bitmask{$s} || 0;
17 }
18 if (@wrong) {
19 require Carp;
20 Carp::croak("Unknown 'strict' tag(s) '@wrong'");
21 }
22 $bits;
23}
24
25136µs199µsmy $default_bits = bits(qw(refs subs vars));
# spent 99µs making 1 call to strict::bits
26
27
# spent 3.03ms (2.85+181µs) within strict::import which was called 106 times, avg 29µs/call: # once (101µs+66µs) by vars::BEGIN at line 8 of vars.pm # once (45µs+66µs) by base::import at line 3 of Class/Data/Inheritable.pm # once (60µs+49µs) by base::BEGIN at line 3 of base.pm # once (50µs+0s) by Class::DBI::_require_class at line 3 of Class/DBI/Relationship/HasMany.pm # once (44µs+0s) by LWP::Protocol::collect at line 133 of HTML/Entities.pm # once (44µs+0s) by base::import at line 5 of version/vxs.pm # once (43µs+0s) by URI::implementor at line 6 of URI/http.pm # once (28µs+0s) by Class::DBI::_require_class at line 6 of Class/Date.pm # once (28µs+0s) by URI::Escape::BEGIN at line 6 of URI/Escape.pm # once (28µs+0s) by LWP::Protocol::BEGIN at line 9 of LWP/Protocol.pm # once (28µs+0s) by base::import at line 3 of Class/DBI/AbstractSearch.pm # once (28µs+0s) by WWW::Google::PageRank::BEGIN at line 5 of WWW/Google/PageRank.pm # once (27µs+0s) by Class::DBI::_require_class at line 587 of Class/Date.pm # once (27µs+0s) by base::import at line 3 of AutoLoader.pm # once (27µs+0s) by base::import at line 3 of Class/Trigger.pm # once (27µs+0s) by base::import at line 257 of IO/Handle.pm # once (27µs+0s) by Net::HTTP::Methods::zlib_ok at line 6 of IO/Compress/Gzip.pm # once (27µs+0s) by base::import at line 2 of Class/DBI/Plugin/Pager.pm # once (27µs+0s) by DBI::_load_class at line 5 of DBIx/ContextualFetch.pm # once (27µs+0s) by URI::BEGIN at line 3 of URI.pm # once (27µs+0s) by base::import at line 3 of Class/DBI/Relationship.pm # once (27µs+0s) by base::import at line 5 of Class/DBI/Plugin/RetrieveAll.pm # once (27µs+0s) by HTTP::Headers::BEGIN at line 5 of HTTP/Headers.pm # once (27µs+0s) by Net::HTTP::Methods::zlib_ok at line 3 of IO/Compress/Adapter/Deflate.pm # once (27µs+0s) by Class::DBI::_require_class at line 2 of Class/Date/Const.pm # once (27µs+0s) by HTTP::Date::BEGIN at line 11 of HTTP/Date.pm # once (27µs+0s) by LWP::Protocol::collect at line 9 of HTML/Parser.pm # once (26µs+0s) by HTTP::Request::BEGIN at line 9 of HTTP/Request.pm # once (26µs+0s) by base::import at line 58 of Class/DBI/Cascade/None.pm # once (26µs+0s) by base::import at line 1 of Class/Accessor/Chained/Fast.pm # once (26µs+0s) by Exporter::as_heavy at line 3 of Exporter/Heavy.pm # once (26µs+0s) by Class::DBI::_require_class at line 3 of constant.pm # once (26µs+0s) by HTTP::Status::BEGIN at line 5 of HTTP/Status.pm # once (26µs+0s) by LWP::Protocol::collect at line 76 of HTML/HeadParser.pm # once (26µs+0s) by Net::HTTP::Methods::zlib_ok at line 5 of IO/Compress/Zlib/Extra.pm # once (26µs+0s) by base::import at line 11 of List/Util.pm # once (26µs+0s) by LWP::UserAgent::BEGIN at line 5 of LWP/UserAgent.pm # once (26µs+0s) by Class::DBI::_require_class at line 3 of Class/DBI/SQL/Transformer.pm # once (26µs+0s) by Net::HTTP::Methods::zlib_ok at line 3 of File/Glob.pm # once (26µs+0s) by base::import at line 9 of Scalar/Util.pm # once (26µs+0s) by LWP::Protocol::implementor at line 7 of Net/HTTP/Methods.pm # once (26µs+0s) by Net::HTTP::Methods::zlib_ok at line 3 of File/GlobMapper.pm # once (26µs+0s) by base::import at line 28 of Class/DBI/Column.pm # once (26µs+0s) by URI::implementor at line 3 of URI/_query.pm # once (26µs+0s) by base::import at line 5 of Ima/DBI.pm # once (26µs+0s) by Net::HTTP::Methods::zlib_ok at line 6 of IO/Compress/Base.pm # once (26µs+0s) by base::import at line 3 of Class/DBI/Pg.pm # once (25µs+0s) by LWP::Protocol::implementor at line 9 of IO/Socket/INET.pm # once (25µs+0s) by Class::DBI::_require_class at line 724 of Class/Date.pm # once (25µs+0s) by LWP::Protocol::implementor at line 6 of LWP/Protocol/http.pm # once (25µs+0s) by base::import at line 4 of Class/DBI/Plugin/AbstractCount.pm # once (25µs+0s) by Net::HTTP::Methods::zlib_ok at line 3 of IO/Uncompress/Adapter/Inflate.pm # once (25µs+0s) by base::import at line 3 of Class/DBI/Query.pm # once (25µs+0s) by Class::DBI::_require_class at line 79 of Class/DBI/Search/Basic.pm # once (25µs+0s) by HTTP::Response::BEGIN at line 9 of HTTP/Response.pm # once (25µs+0s) by HTTP::Message::BEGIN at line 5 of HTTP/Message.pm # once (25µs+0s) by Class::DBI::_require_class at line 3 of Class/DBI/Relationship/HasA.pm # once (25µs+0s) by Net::HTTP::Methods::zlib_ok at line 3 of IO/Compress/Base/Common.pm # once (25µs+0s) by Class::DBI::_require_class at line 14 of Class/DBI/Cascade/Delete.pm # once (25µs+0s) by Class::DBI::_require_class at line 3 of Class/DBI/Relationship/MightHave.pm # once (25µs+0s) by base::import at line 5 of Config.pm # once (25µs+0s) by Net::HTTP::Methods::zlib_ok at line 3 of IO/Compress/Gzip/Constants.pm # once (25µs+0s) by base::import at line 128 of IO/File.pm # once (25µs+0s) by IO::Socket::connect at line 9 of IO/Select.pm # once (25µs+0s) by base::import at line 4 of Clone.pm # once (25µs+0s) by base::import at line 1775 of DBI.pm # once (25µs+0s) by LWP::Protocol::implementor at line 5 of Net/HTTP.pm # once (25µs+0s) by base::import at line 3 of File/Spec/Unix.pm # once (25µs+0s) by Net::HTTP::Methods::zlib_ok at line 4 of IO/Uncompress/Base.pm # once (25µs+0s) by LWP::UserAgent::get at line 5 of HTTP/Request/Common.pm # once (24µs+0s) by base::import at line 3 of Class/Accessor.pm # once (24µs+0s) by base::import at line 9 of attributes.pm # once (24µs+0s) by base::import at line 4 of FileHandle.pm # once (24µs+0s) by base::import at line 4 of Class/DBI/Plugin.pm # once (24µs+0s) by DBI::install_driver at line 250 of DBD/Pg.pm # once (24µs+0s) by base::import at line 2 of SQL/Abstract/Limit.pm # once (24µs+0s) by URI::implementor at line 5 of URI/_server.pm # once (24µs+0s) by base::import at line 12 of DBI/Const/GetInfoType.pm # once (24µs+0s) by base::import at line 3 of File/Spec.pm # once (24µs+0s) by URI::implementor at line 6 of URI/_generic.pm # once (24µs+0s) by base::import at line 11 of UNIVERSAL/require.pm # once (24µs+0s) by Net::HTTP::Methods::zlib_ok at line 8 of IO/Uncompress/Gunzip.pm # once (24µs+0s) by base::import at line 1329 of DBI.pm # once (24µs+0s) by base::import at line 1473 of DBI.pm # once (24µs+0s) by base::import at line 1409 of DBI.pm # once (24µs+0s) by base::import at line 28 of Class/DBI/ColumnGrouper.pm # once (24µs+0s) by LWP::Protocol::implementor at line 9 of IO/Socket/UNIX.pm # once (23µs+0s) by base::import at line 5 of version.pm # once (23µs+0s) by Net::HTTP::Methods::zlib_ok at line 497 of IO/Compress/Base/Common.pm # once (23µs+0s) by base::import at line 12 of Class/DBI.pm # once (23µs+0s) by Net::HTTP::Methods::zlib_ok at line 5 of IO/Compress/RawDeflate.pm # once (23µs+0s) by DBI::install_driver at line 170 of DBD/Pg.pm # once (23µs+0s) by DBI::install_driver at line 13 of DBD/Pg.pm # once (23µs+0s) by Net::HTTP::Methods::zlib_ok at line 16 of Compress/Zlib.pm # once (23µs+0s) by Net::HTTP::Methods::zlib_ok at line 4 of IO/Uncompress/RawInflate.pm # once (23µs+0s) by base::import at line 99 of IO/Seekable.pm # once (22µs+0s) by Net::HTTP::Methods::zlib_ok at line 11 of Compress/Raw/Zlib.pm # once (22µs+0s) by LWP::Protocol::implementor at line 9 of Errno.pm # once (21µs+0s) by base::import at line 145 of SQL/Abstract.pm # once (21µs+0s) by base::import at line 3 of Class/Accessor/Fast.pm # once (21µs+0s) by base::import at line 4 of K2/DB2.pm # once (21µs+0s) by Class::DBI::_require_class at line 6 of Time/Local.pm # once (21µs+0s) by base::import at line 3 of Data/Page.pm # once (21µs+0s) by LWP::Protocol::implementor at line 14 of IO/Socket.pm # once (21µs+0s) by base::import at line 269 of DBI.pm # once (20µs+0s) by base::import at line 7 of IO.pm
sub import {
282124.03ms shift;
29 $^H |= @_ ? bits(@_) : $default_bits;
# spent 181µs making 3 calls to strict::bits, avg 60µs/call
30}
31
32
# spent 4.31ms (1.89+2.42) within strict::unimport which was called 43 times, avg 100µs/call: # once (69µs+61µs) by HTTP::Message::BEGIN at line 370 of HTTP/Message.pm # once (61µs+61µs) by base::import at line 603 of IO/Handle.pm # once (42µs+78µs) by base::import at line 31 of Config.pm # once (58µs+59µs) by LWP::Protocol::implementor at line 75 of Net/HTTP/Methods.pm # once (41µs+74µs) by base::import at line 150 of Class/Accessor.pm # once (52µs+58µs) by base::import at line 18 of Class/Trigger.pm # once (48µs+58µs) by LWP::UserAgent::BEGIN at line 383 of LWP/UserAgent.pm # once (45µs+60µs) by LWP::Protocol::implementor at line 190 of Errno.pm # once (43µs+62µs) by base::import at line 63 of Class/DBI/Relationship.pm # once (43µs+62µs) by base::import at line 1220 of Class/DBI.pm # once (46µs+59µs) by base::import at line 944 of Class/DBI.pm # once (46µs+57µs) by base::import at line 128 of AutoLoader.pm # once (47µs+56µs) by base::import at line 511 of DBI.pm # once (44µs+58µs) by base::import at line 277 of Ima/DBI.pm # once (48µs+54µs) by base::import at line 652 of DBI.pm # once (46µs+56µs) by base::import at line 764 of DBI.pm # once (44µs+58µs) by base::import at line 18 of Class/DBI/Plugin.pm # once (39µs+62µs) by base::import at line 107 of Class/DBI/Plugin/Pager.pm # once (47µs+54µs) by URI::BEGIN at line 114 of URI.pm # once (42µs+59µs) by base::import at line 1030 of Class/DBI.pm # once (43µs+57µs) by base::import at line 95 of AutoLoader.pm # once (42µs+58µs) by Net::HTTP::Methods::zlib_ok at line 73 of Compress/Raw/Zlib.pm # once (43µs+57µs) by base::import at line 144 of File/Spec/Unix.pm # once (46µs+54µs) by base::import at line 371 of Class/DBI.pm # once (44µs+55µs) by base::import at line 989 of DBI.pm # once (43µs+56µs) by Class::DBI::_require_class at line 94 of constant.pm # once (44µs+55µs) by LWP::Protocol::BEGIN at line 65 of LWP/Protocol.pm # once (41µs+57µs) by base::import at line 923 of DBI.pm # once (43µs+55µs) by base::import at line 797 of DBI.pm # once (42µs+56µs) by base::import at line 46 of FileHandle.pm # once (43µs+55µs) by base::import at line 67 of Class/DBI.pm # once (41µs+56µs) by Net::HTTP::Methods::zlib_ok at line 49 of Compress/Zlib.pm # once (40µs+56µs) by base::import at line 29 of version.pm # once (41µs+55µs) by base::import at line 364 of Ima/DBI.pm # once (42µs+54µs) by base::import at line 1092 of Class/DBI.pm # once (41µs+54µs) by base::import at line 173 of AutoLoader.pm # once (42µs+53µs) by base::import at line 65 of Class/Trigger.pm # once (40µs+55µs) by Class::DBI::_require_class at line 17 of Class/DBI/Relationship/HasMany.pm # once (40µs+54µs) by base::import at line 67 of Class/DBI/Plugin/RetrieveAll.pm # once (40µs+52µs) by base::import at line 826 of DBI.pm # once (37µs+54µs) by base::import at line 1120 of Class/DBI.pm # once (34µs+54µs) by Exporter::as_heavy at line 4 of Exporter/Heavy.pm # once (25µs+0s) by base::import at line 265 of DBI.pm
sub unimport {
33861.74ms shift;
34 $^H &= ~ (@_ ? bits(@_) : $default_bits);
# spent 2.42ms making 42 calls to strict::bits, avg 58µs/call
35}
36
37117µs1;
38__END__
39
40=head1 NAME
41
42strict - Perl pragma to restrict unsafe constructs
43
44=head1 SYNOPSIS
45
46 use strict;
47
48 use strict "vars";
49 use strict "refs";
50 use strict "subs";
51
52 use strict;
53 no strict "vars";
54
55=head1 DESCRIPTION
56
57If no import list is supplied, all possible restrictions are assumed.
58(This is the safest mode to operate in, but is sometimes too strict for
59casual programming.) Currently, there are three possible things to be
60strict about: "subs", "vars", and "refs".
61
62=over 6
63
64=item C<strict refs>
65
66This generates a runtime error if you
67use symbolic references (see L<perlref>).
68
69 use strict 'refs';
70 $ref = \$foo;
71 print $$ref; # ok
72 $ref = "foo";
73 print $$ref; # runtime error; normally ok
74 $file = "STDOUT";
75 print $file "Hi!"; # error; note: no comma after $file
76
77There is one exception to this rule:
78
79 $bar = \&{'foo'};
80 &$bar;
81
82is allowed so that C<goto &$AUTOLOAD> would not break under stricture.
83
84
85=item C<strict vars>
86
87This generates a compile-time error if you access a variable that wasn't
88declared via C<our> or C<use vars>,
89localized via C<my()>, or wasn't fully qualified. Because this is to avoid
90variable suicide problems and subtle dynamic scoping issues, a merely
91local() variable isn't good enough. See L<perlfunc/my> and
92L<perlfunc/local>.
93
94 use strict 'vars';
95 $X::foo = 1; # ok, fully qualified
96 my $foo = 10; # ok, my() var
97 local $foo = 9; # blows up
98
99 package Cinna;
100 our $bar; # Declares $bar in current package
101 $bar = 'HgS'; # ok, global declared via pragma
102
103The local() generated a compile-time error because you just touched a global
104name without fully qualifying it.
105
106Because of their special use by sort(), the variables $a and $b are
107exempted from this check.
108
109=item C<strict subs>
110
111This disables the poetry optimization, generating a compile-time error if
112you try to use a bareword identifier that's not a subroutine, unless it
113is a simple identifier (no colons) and that it appears in curly braces or
114on the left hand side of the C<< => >> symbol.
115
116 use strict 'subs';
117 $SIG{PIPE} = Plumber; # blows up
118 $SIG{PIPE} = "Plumber"; # just fine: quoted string is always ok
119 $SIG{PIPE} = \&Plumber; # preferred form
120
121=back
122
123See L<perlmodlib/Pragmatic Modules>.
124
125=head1 HISTORY
126
127C<strict 'subs'>, with Perl 5.6.1, erroneously permitted to use an unquoted
128compound identifier (e.g. C<Foo::Bar>) as a hash key (before C<< => >> or
129inside curlies), but without forcing it always to a literal string.
130
131Starting with Perl 5.8.1 strict is strict about its restrictions:
132if unknown restrictions are used, the strict pragma will abort with
133
134 Unknown 'strict' tag(s) '...'
135
136=cut
Report produced by the NYTProf 3.11 Perl profiler, developed by Tim Bunce and Adam Kaplan.