NAME

Time::Strptime - parse date and time string.

SYNOPSIS

    use Time::Strptime qw/strptime/;

    # function
    my ($epoch_f, $offset_f) = strptime('%Y-%m-%d %H:%M:%S', '2014-01-01 00:00:00');

    # OO style
    my $fmt = Time::Strptime::Format->new('%Y-%m-%d %H:%M:%S');
    my ($epoch_o, $offset_o) = $fmt->parse('2014-01-01 00:00:00');

DESCRIPTION

Time::Strptime is pure perl date and time string parser. In other words, This is pure perl implementation a strptime(3).

This module allows you to perform better by pre-compile the format by string.

benchmark:GMT(-0000) dt=DateTime, ts=Time::Strptime, tp=Time::Piece

    Benchmark: running dt, dt(cached), pt, tm, tp, tp(cached), ts, ts(cached) for at least 10 CPU seconds...
            dt: 10 wallclock secs (10.62 usr +  0.03 sys = 10.65 CPU) @ 2189.58/s (n=23319)
    dt(cached): 11 wallclock secs (10.76 usr +  0.03 sys = 10.79 CPU) @ 7451.53/s (n=80402)
            tp: 11 wallclock secs (10.31 usr +  0.02 sys = 10.33 CPU) @ 120097.97/s (n=1240612)
    tp(cached): 10 wallclock secs (10.75 usr +  0.03 sys = 10.78 CPU) @ 271138.50/s (n=2922873)
            ts: 10 wallclock secs (10.30 usr +  0.02 sys = 10.32 CPU) @ 3626.74/s (n=37428)
    ts(cached): 11 wallclock secs (10.38 usr +  0.02 sys = 10.40 CPU) @ 168626.35/s (n=1753714)
                    Rate     dt     ts dt(cached)    tp ts(cached) tp(cached)
    dt            2190/s     --   -40%       -71%  -98%       -99%       -99%
    ts            3627/s    66%     --       -51%  -97%       -98%       -99%
    dt(cached)    7452/s   240%   105%         --  -94%       -96%       -97%
    tp          120098/s  5385%  3211%      1512%    --       -29%       -56%
    ts(cached)  168626/s  7601%  4550%      2163%   40%         --       -38%
    tp(cached)  271138/s 12283%  7376%      3539%  126%        61%         --

benchmark:Asia/Tokyo(-0900) dt=DateTime, ts=Time::Strptime, tp=Time::Piece

    Benchmark: running dt, dt(cached), pt, tm, tp, tp(cached), ts, ts(cached) for at least 10 CPU seconds...
            dt: 11 wallclock secs (10.87 usr +  0.02 sys = 10.89 CPU) @ 2075.76/s (n=22605)
    dt(cached): 11 wallclock secs (10.59 usr +  0.03 sys = 10.62 CPU) @ 6561.11/s (n=69679)
            tp: 12 wallclock secs (10.99 usr +  0.03 sys = 11.02 CPU) @ 120083.39/s (n=1323319)
    tp(cached): 10 wallclock secs (10.69 usr +  0.03 sys = 10.72 CPU) @ 270033.49/s (n=2894759)
            ts: 10 wallclock secs (10.73 usr +  0.03 sys = 10.76 CPU) @ 3179.37/s (n=34210)
    ts(cached): 12 wallclock secs (10.95 usr +  0.04 sys = 10.99 CPU) @ 79787.26/s (n=876862)
                    Rate     dt     ts dt(cached) ts(cached)    tp tp(cached)
    dt            2076/s     --   -35%       -68%       -97%  -98%       -99%
    ts            3179/s    53%     --       -52%       -96%  -97%       -99%
    dt(cached)    6561/s   216%   106%         --       -92%  -95%       -98%
    ts(cached)   79787/s  3744%  2410%      1116%         --  -34%       -70%
    tp          120083/s  5685%  3677%      1730%        51%    --       -56%
    tp(cached)  270033/s 12909%  8393%      4016%       238%  125%         --

FAQ

What's the difference between this module and other modules?

This module is fast and not require XS. but, support epoch strptime only. DateTime is very useful and stable! but, It is slow. Time::Piece is fast and useful! but, treatment of time zone is confusing. and, require XS. Time::Moment is very fast and useful! but, does not support strptime. and, require XS.

How to specify a time zone?

Set time zone name or DateTime::TimeZone object to time_zone option.

    use Time::Strptime::Format;

    my $format = Time::Strptime::Format->new('%Y-%m-%d %H:%M:%S', { time_zone => 'Asia/Tokyo' });
    my ($epoch, $offset) = $format->parse('2014-01-01 00:00:00');

How to specify a locale?

Set locale name object to locale option.

    use Time::Strptime::Format;

    my $format = Time::Strptime::Format->new('%Y-%m-%d %H:%M:%S', { locale => 'ja_JP' });
    my ($epoch, $offset) = $format->parse('2014-01-01 00:00:00');

LICENSE

Copyright (C) karupanerura.

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

AUTHOR

karupanerura <karupa@cpan.org>