Profile of Time/Local.pm

Filename	/usr/share/perl/5.10/Time/Local.pm
Statements	Executed 81 statements in 1.37ms

Subroutines
Calls	P	F	Exclusive Time	Inclusive Time	Subroutine
3	2	1	34µs	43µs	Time::Local::::_daygmTime::Local::_daygm
2	1	1	33µs	60µs	Time::Local::::timegmTime::Local::timegm
1	1	1	30µs	94µs	Time::Local::::BEGIN@5Time::Local::BEGIN@5
1	1	1	24µs	126µs	Time::Local::::BEGIN@28Time::Local::BEGIN@28
1	1	1	22µs	99µs	Time::Local::::BEGIN@4Time::Local::BEGIN@4
1	1	1	14µs	17µs	Time::Local::::BEGIN@7Time::Local::BEGIN@7
1	1	1	12µs	16µs	Time::Local::::BEGIN@6Time::Local::BEGIN@6
1	1	1	11µs	51µs	Time::Local::::BEGIN@29Time::Local::BEGIN@29
1	1	1	10µs	44µs	Time::Local::::BEGIN@30Time::Local::BEGIN@30
1	1	1	9µs	75µs	Time::Local::::BEGIN@9Time::Local::BEGIN@9
3	1	1	9µs	9µs	Time::Local::::CORE:packTime::Local::CORE:pack (opcode)
0	0	0	0s	0s	Time::Local::::_is_leap_yearTime::Local::_is_leap_year
0	0	0	0s	0s	Time::Local::::_timegmTime::Local::_timegm
0	0	0	0s	0s	Time::Local::::timegm_nocheckTime::Local::timegm_nocheck
0	0	0	0s	0s	Time::Local::::timelocalTime::Local::timelocal
0	0	0	0s	0s	Time::Local::::timelocal_nocheckTime::Local::timelocal_nocheck

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

Line	State ments	Time on line	Calls	Time in subs	Code
1					package Time::Local;
2
3	1	1µs			require Exporter;
4	3	52µs	2	175µs	# spent 99µs (22+77) within Time::Local::BEGIN@4 which was called: # once (22µs+77µs) by LWP::UserAgent::BEGIN@12 at line 4 use Carp; # spent 99µs making 1 call to Time::Local::BEGIN@4 # spent 77µs making 1 call to Exporter::import
5	3	48µs	2	157µs	# spent 94µs (30+63) within Time::Local::BEGIN@5 which was called: # once (30µs+63µs) by LWP::UserAgent::BEGIN@12 at line 5 use Config; # spent 94µs making 1 call to Time::Local::BEGIN@5 # spent 63µs making 1 call to Config::import
6	3	26µs	2	21µs	# spent 16µs (12+4) within Time::Local::BEGIN@6 which was called: # once (12µs+4µs) by LWP::UserAgent::BEGIN@12 at line 6 use strict; # spent 16µs making 1 call to Time::Local::BEGIN@6 # spent 4µs making 1 call to strict::import
7	3	40µs	2	20µs	# spent 17µs (14+3) within Time::Local::BEGIN@7 which was called: # once (14µs+3µs) by LWP::UserAgent::BEGIN@12 at line 7 use integer; # spent 17µs making 1 call to Time::Local::BEGIN@7 # spent 3µs making 1 call to integer::import
8
9	3	106µs	2	141µs	# spent 75µs (9+66) within Time::Local::BEGIN@9 which was called: # once (9µs+66µs) by LWP::UserAgent::BEGIN@12 at line 9 use vars qw( $VERSION @ISA @EXPORT @EXPORT_OK ); # spent 75µs making 1 call to Time::Local::BEGIN@9 # spent 66µs making 1 call to vars::import
10	1	1µs			$VERSION = '1.1901';
11
12	1	14µs			@ISA = qw( Exporter );
13	1	1µs			@EXPORT = qw( timegm timelocal );
14	1	1µs			@EXPORT_OK = qw( timegm_nocheck timelocal_nocheck );
15
16	1	2µs			my @MonthDays = ( 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 );
17
18					# Determine breakpoint for rolling century
19	1	29µs			my $ThisYear = ( localtime() )[5];
20	1	1µs			my $Breakpoint = ( $ThisYear + 50 ) % 100;
21	1	600ns			my $NextCentury = $ThisYear - $ThisYear % 100;
22	1	500ns			$NextCentury += 100 if $Breakpoint < 50;
23	1	300ns			my $Century = $NextCentury - 100;
24	1	300ns			my $SecOff = 0;
25
26	1	600ns			my ( %Options, %Cheat );
27
28	3	60µs	2	227µs	# spent 126µs (24+101) within Time::Local::BEGIN@28 which was called: # once (24µs+101µs) by LWP::UserAgent::BEGIN@12 at line 28 use constant SECS_PER_MINUTE => 60; # spent 126µs making 1 call to Time::Local::BEGIN@28 # spent 101µs making 1 call to constant::import
29	3	44µs	2	92µs	# spent 51µs (11+40) within Time::Local::BEGIN@29 which was called: # once (11µs+40µs) by LWP::UserAgent::BEGIN@12 at line 29 use constant SECS_PER_HOUR => 3600; # spent 51µs making 1 call to Time::Local::BEGIN@29 # spent 40µs making 1 call to constant::import
30	3	820µs	2	77µs	# spent 44µs (10+34) within Time::Local::BEGIN@30 which was called: # once (10µs+34µs) by LWP::UserAgent::BEGIN@12 at line 30 use constant SECS_PER_DAY => 86400; # spent 44µs making 1 call to Time::Local::BEGIN@30 # spent 34µs making 1 call to constant::import
31
32	1	200ns			my $MaxInt;
33	2	13µs			if ( $^O eq 'MacOS' ) {
34					# time_t is unsigned...
35					$MaxInt = ( 1 << ( 8 * $Config{ivsize} ) ) - 1;
36					}
37					else {
38	1	4µs	1	64µs	$MaxInt = ( ( 1 << ( 8 * $Config{ivsize} - 2 ) ) - 1 ) * 2 + 1; # spent 64µs making 1 call to Config::FETCH
39					}
40
41	1	1µs			my $MaxDay = int( ( $MaxInt - ( SECS_PER_DAY / 2 ) ) / SECS_PER_DAY ) - 1;
42
43					# Determine the EPOC day for this machine
44	1	300ns			my $Epoc = 0;
45	2	7µs			if ( $^O eq 'vos' ) {
46					# work around posix-977 -- VOS doesn't handle dates in the range
47					# 1970-1980.
48					$Epoc = _daygm( 0, 0, 0, 1, 0, 70, 4, 0 );
49					}
50					elsif ( $^O eq 'MacOS' ) {
51					$MaxDay *=2 if $^O eq 'MacOS'; # time_t unsigned ... quick hack?
52					# MacOS time() is seconds since 1 Jan 1904, localtime
53					# so we need to calculate an offset to apply later
54					$Epoc = 693901;
55					$SecOff = timelocal( localtime(0)) - timelocal( gmtime(0) ) ;
56					$Epoc += _daygm( gmtime(0) );
57					}
58					else {
59			1	17µs	$Epoc = _daygm( gmtime(0) ); # spent 17µs making 1 call to Time::Local::_daygm
60					}
61
62	1	1µs			%Cheat = (); # clear the cache as epoc has changed
63
64					# spent 43µs (34+9) within Time::Local::_daygm which was called 3 times, avg 14µs/call: # 2 times (22µs+5µs) by Time::Local::timegm at line 116, avg 13µs/call # once (13µs+4µs) by LWP::UserAgent::BEGIN@12 at line 59 sub _daygm {
65
66					# This is written in such a byzantine way in order to avoid
67					# lexical variables and sub calls, for speed
68					return $_[3] + (
69	9	47µs	3	9µs	$Cheat{ pack( 'ss', @_[ 4, 5 ] ) } \|\|= do { # spent 9µs making 3 calls to Time::Local::CORE:pack, avg 3µs/call
70					my $month = ( $_[4] + 10 ) % 12;
71					my $year = ( $_[5] + 1900 ) - ( $month / 10 );
72
73					( ( 365 * $year )
74					+ ( $year / 4 )
75					- ( $year / 100 )
76					+ ( $year / 400 )
77					+ ( ( ( $month * 306 ) + 5 ) / 10 )
78					)
79					- $Epoc;
80					}
81					);
82					}
83
84					sub _timegm {
85					my $sec =
86					$SecOff + $_[0] + ( SECS_PER_MINUTE * $_[1] ) + ( SECS_PER_HOUR * $_[2] );
87
88					return $sec + ( SECS_PER_DAY * &_daygm );
89					}
90
91					# spent 60µs (33+26) within Time::Local::timegm which was called 2 times, avg 30µs/call: # 2 times (33µs+26µs) by Set::Infinite::BEGIN@18 at line 32 of Set/Infinite/Arithmetic.pm, avg 30µs/call sub timegm {
92	12	22µs			my ( $sec, $min, $hour, $mday, $month, $year ) = @_;
93
94					if ( $year >= 1000 ) {
95					$year -= 1900;
96					}
97					elsif ( $year < 100 and $year >= 0 ) {
98					$year += ( $year > $Breakpoint ) ? $Century : $NextCentury;
99					}
100
101	14	8µs			unless ( $Options{no_range_check} ) {
102					croak "Month '$month' out of range 0..11"
103					if $month > 11
104					or $month < 0;
105
106					my $md = $MonthDays[$month];
107					++$md
108					if $month == 1 && _is_leap_year( $year + 1900 );
109
110					croak "Day '$mday' out of range 1..$md" if $mday > $md or $mday < 1;
111					croak "Hour '$hour' out of range 0..23" if $hour > 23 or $hour < 0;
112					croak "Minute '$min' out of range 0..59" if $min > 59 or $min < 0;
113					croak "Second '$sec' out of range 0..59" if $sec > 59 or $sec < 0;
114					}
115
116			2	26µs	my $days = _daygm( undef, undef, undef, $mday, $month, $year ); # spent 26µs making 2 calls to Time::Local::_daygm, avg 13µs/call
117
118					unless ($Options{no_range_check} or abs($days) < $MaxDay) {
119					my $msg = '';
120					$msg .= "Day too big - $days > $MaxDay\n" if $days > $MaxDay;
121
122					$year += 1900;
123					$msg .= "Cannot handle date ($sec, $min, $hour, $mday, $month, $year)";
124
125					croak $msg;
126					}
127
128					return $sec
129					+ $SecOff
130					+ ( SECS_PER_MINUTE * $min )
131					+ ( SECS_PER_HOUR * $hour )
132					+ ( SECS_PER_DAY * $days );
133					}
134
135					sub _is_leap_year {
136					return 0 if $_[0] % 4;
137					return 1 if $_[0] % 100;
138					return 0 if $_[0] % 400;
139
140					return 1;
141					}
142
143					sub timegm_nocheck {
144					local $Options{no_range_check} = 1;
145					return &timegm;
146					}
147
148					sub timelocal {
149					my $ref_t = &timegm;
150					my $loc_for_ref_t = _timegm( localtime($ref_t) );
151
152					my $zone_off = $loc_for_ref_t - $ref_t
153					or return $loc_for_ref_t;
154
155					# Adjust for timezone
156					my $loc_t = $ref_t - $zone_off;
157
158					# Are we close to a DST change or are we done
159					my $dst_off = $ref_t - _timegm( localtime($loc_t) );
160
161					# If this evaluates to true, it means that the value in $loc_t is
162					# the _second_ hour after a DST change where the local time moves
163					# backward.
164					if ( ! $dst_off &&
165					( ( $ref_t - SECS_PER_HOUR ) - _timegm( localtime( $loc_t - SECS_PER_HOUR ) ) < 0 )
166					) {
167					return $loc_t - SECS_PER_HOUR;
168					}
169
170					# Adjust for DST change
171					$loc_t += $dst_off;
172
173					return $loc_t if $dst_off > 0;
174
175					# If the original date was a non-extent gap in a forward DST jump,
176					# we should now have the wrong answer - undo the DST adjustment
177					my ( $s, $m, $h ) = localtime($loc_t);
178					$loc_t -= $dst_off if $s != $_[0] \|\| $m != $_[1] \|\| $h != $_[2];
179
180					return $loc_t;
181					}
182
183					sub timelocal_nocheck {
184					local $Options{no_range_check} = 1;
185					return &timelocal;
186					}
187
188	1	21µs			1;
189
190					__END__

					# spent 9µs within Time::Local::CORE:pack which was called 3 times, avg 3µs/call: # 3 times (9µs+0s) by Time::Local::_daygm at line 69, avg 3µs/call sub Time::Local::CORE:pack; # opcode