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package Time::Strptime; |
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use 5.008005; |
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use strict; |
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use warnings; |
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our $VERSION = "1.01"; |
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use parent qw/Exporter/; |
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our @EXPORT_OK = qw/strptime/; |
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use Carp (); |
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use Time::Strptime::Format; |
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my %instance_cache; |
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sub strptime { |
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my ($format_text, $date_text) = @_; |
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local $Carp::CarpLevel = $Carp::CarpLevel + 1; |
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my $format = $instance_cache{$format_text} ||= Time::Strptime::Format->new($format_text); |
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return $format->parse($date_text); |
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} |
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1; |
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__END__ |
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=encoding utf-8 |
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=head1 NAME |
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Time::Strptime - parse date and time string. |
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=head1 SYNOPSIS |
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use Time::Strptime qw/strptime/; |
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# function |
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my ($epoch_f, $offset_f) = strptime('%Y-%m-%d %H:%M:%S', '2014-01-01 00:00:00'); |
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# OO style |
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my $fmt = Time::Strptime::Format->new('%Y-%m-%d %H:%M:%S'); |
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my ($epoch_o, $offset_o) = $fmt->parse('2014-01-01 00:00:00'); |
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=head1 DESCRIPTION |
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Time::Strptime is pure perl date and time string parser. |
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In other words, This is pure perl implementation a L<strptime(3)>. |
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This module allows you to perform better by pre-compile the format by string. |
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benchmark:GMT(-0000) C<dt=DateTime, ts=Time::Strptime, tp=Time::Piece> |
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Benchmark: running dt, dt(cached), pt, tm, tp, tp(cached), ts, ts(cached) for at least 10 CPU seconds... |
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dt: 10 wallclock secs (10.62 usr + 0.03 sys = 10.65 CPU) @ 2189.58/s (n=23319) |
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dt(cached): 11 wallclock secs (10.76 usr + 0.03 sys = 10.79 CPU) @ 7451.53/s (n=80402) |
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tp: 11 wallclock secs (10.31 usr + 0.02 sys = 10.33 CPU) @ 120097.97/s (n=1240612) |
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tp(cached): 10 wallclock secs (10.75 usr + 0.03 sys = 10.78 CPU) @ 271138.50/s (n=2922873) |
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ts: 10 wallclock secs (10.30 usr + 0.02 sys = 10.32 CPU) @ 3626.74/s (n=37428) |
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ts(cached): 11 wallclock secs (10.38 usr + 0.02 sys = 10.40 CPU) @ 168626.35/s (n=1753714) |
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Rate dt ts dt(cached) tp ts(cached) tp(cached) |
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dt 2190/s -- -40% -71% -98% -99% -99% |
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ts 3627/s 66% -- -51% -97% -98% -99% |
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dt(cached) 7452/s 240% 105% -- -94% -96% -97% |
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tp 120098/s 5385% 3211% 1512% -- -29% -56% |
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ts(cached) 168626/s 7601% 4550% 2163% 40% -- -38% |
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tp(cached) 271138/s 12283% 7376% 3539% 126% 61% -- |
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benchmark:Asia/Tokyo(-0900) C<dt=DateTime, ts=Time::Strptime, tp=Time::Piece> |
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Benchmark: running dt, dt(cached), pt, tm, tp, tp(cached), ts, ts(cached) for at least 10 CPU seconds... |
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dt: 11 wallclock secs (10.87 usr + 0.02 sys = 10.89 CPU) @ 2075.76/s (n=22605) |
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dt(cached): 11 wallclock secs (10.59 usr + 0.03 sys = 10.62 CPU) @ 6561.11/s (n=69679) |
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tp: 12 wallclock secs (10.99 usr + 0.03 sys = 11.02 CPU) @ 120083.39/s (n=1323319) |
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tp(cached): 10 wallclock secs (10.69 usr + 0.03 sys = 10.72 CPU) @ 270033.49/s (n=2894759) |
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ts: 10 wallclock secs (10.73 usr + 0.03 sys = 10.76 CPU) @ 3179.37/s (n=34210) |
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ts(cached): 12 wallclock secs (10.95 usr + 0.04 sys = 10.99 CPU) @ 79787.26/s (n=876862) |
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Rate dt ts dt(cached) ts(cached) tp tp(cached) |
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dt 2076/s -- -35% -68% -97% -98% -99% |
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ts 3179/s 53% -- -52% -96% -97% -99% |
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dt(cached) 6561/s 216% 106% -- -92% -95% -98% |
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ts(cached) 79787/s 3744% 2410% 1116% -- -34% -70% |
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tp 120083/s 5685% 3677% 1730% 51% -- -56% |
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tp(cached) 270033/s 12909% 8393% 4016% 238% 125% -- |
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=head1 FAQ |
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=head2 What's the difference between this module and other modules? |
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This module is fast and not require XS. but, support epoch C<strptime> only. |
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L<DateTime> is very useful and stable! but, It is slow. |
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L<Time::Piece> is fast and useful! but, treatment of time zone is confusing. and, require XS. |
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L<Time::Moment> is very fast and useful! but, not support C<strptime>. and, require XS. |
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=head2 How to specify a time zone? |
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Set time zone name or L<DateTime::TimeZone> object to C<time_zone> option. |
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use Time::Strptime::Format; |
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my $format = Time::Strptime::Format->new('%Y-%m-%d %H:%M:%S', { time_zone => 'Asia/Tokyo' }); |
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my ($epoch, $offset) = $format->parse('2014-01-01 00:00:00'); |
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=head2 How to specify a locale? |
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Set locale name object to C<locale> option. |
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use Time::Strptime::Format; |
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my $format = Time::Strptime::Format->new('%Y-%m-%d %H:%M:%S', { locale => 'ja_JP' }); |
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my ($epoch, $offset) = $format->parse('2014-01-01 00:00:00'); |
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=head1 LICENSE |
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Copyright (C) karupanerura. |
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This library is free software; you can redistribute it and/or modify |
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it under the same terms as Perl itself. |
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=head1 AUTHOR |
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karupanerura E<lt>karupa@cpan.orgE<gt> |
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=cut |