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If can live with its limitations(1), you could try something like this:

#! perl -slw use strict; use constant MONTHS => { qw[ Jan 0 Feb 31 Mar 59 Apr 90 May 120 Jun 151 Jul 181 Aug 212 Sep 242 Oct 272 Nov 303 Dec 334 ] }; sub str2epoch { my( $d, $m, $y, $H, $M, $S ) = $_[0] =~ m[^.... (\d\d) (...) (\d\d\d\d) (\d\d):(\d\d):(\d\d)] or die "Bad format $_[0]"; my $leaps = int( ($y - 1970) / 4 + 0.5 ); (((($y-1970)*365 +$leaps+MONTHS->{$m}+($d-1))*24 +$H)*60 +$M)*60 + +$S; } my $date = 'Fri, 01 Mar 2013 01:21:14 +0000';; print str2epoch( $date ); print scalar localtime str2epoch( $date ); print scalar localtime str2epoch( 'Fri, 12 Jul 2013 01:20:34' );; __END__ C:\test\primes>..\str2epoch.pl 1362100874 Fri Mar 1 01:21:14 2013 Fri Jul 12 02:20:34 2013

And if you need a little more you might parse the numbers with unpack instead of the regex engine.

1 Limitations include:

  • No leap seconds;
  • No daylight savings;
  • No timezones;
  • Only works for another 87 years.

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In reply to Re: High-speed Date Formatting by BrowserUk
in thread *SOLVED* High-speed Date Formatting by Endless

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