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rjt's scratchpad

by rjt (Deacon)
on May 19, 2010 at 18:46 UTC ( #840763=scratchpad: print w/ replies, xml ) Need Help??

For BrowserUk:

Rate str2time split_nocheck BrowserUk2 BrowserUk + inline_c str2time 16534/s -- -87% -93% -93% + -97% split_nocheck 127292/s 670% -- -44% -45% + -74% BrowserUk2 227574/s 1276% 79% -- -2% + -53% BrowserUk 231067/s 1297% 82% 2% -- + -52% inline_c 485678/s 2837% 282% 113% 110% + --

use Benchmark qw/cmpthese/; use Date::Parse; # str2time use Time::Local qw/timegm_nocheck/; my %mon; @mon{qw/Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec/} = 0..11; # For BrowserUk's sub 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 ] }; use Inline C => q@ int epoch_sec(char * date) { char *tz_str = date + 26; struct tm tm; int tz; if ( strlen(date) != 31 || strptime(date, "%a, %d %b %Y %T", &tm) == NULL || sscanf(tz_str, "%d", &tz) != 1) { printf("Invalid date %s\n", date); return 0; } return timegm(&tm) - (tz < 0 ? -1 : 1)*(abs(tz)/100*3600 + abs(tz)%100*60); } @; our $date = "Fri, 01 Mar 2013 01:21:14 +0200"; cmpthese(-3, { str2time => sub { str2time($date) }, # split_nocheck => sub { # my (undef, $dd, $Mm, $yyyy, $hh, $mm, $ss, $tz) # = split /[ ,:]+/o, $date; # timegm_nocheck($ss, $mm, $hh, $dd, $mon{$Mm}, $yyyy) # - ($tz < 0 ? -1 : 1)*(substr($tz,1,2)*3600 + substr($ +tz,3)*60) # }, BrowserUk => sub { my( $d, $m, $y, $H, $M, $S, $tz ) = $date =~ m/^.... (\d\d) (...) (\d\d\d\d) (\d\d):(\d\d):(\d\d) ([+-] +\d{4})/ or die "Bad format $date"; my $leaps = int( ($y - 1970) / 4 + 0.5 ); (((($y-1970)*365 +$leaps+MONTHS->{$m}+($d-1))*24 +$H)*60 +$M)* +60 +$S - ($tz < 0 ? -1 : 1)*(substr($tz,1,2)*3600 + substr($tz,3) +*60) }, BrowserUk2 => sub { my( $d, $m, $y, $H, $M, $S, $tzs, $tzh, $tzm ) = $date =~ m[^.... (\d\d) (...) (\d\d\d\d) (\d\d):(\d\d):(\d\d) ([+-] +)(\d\d)(\d\d)] or die "Bad format $date"; my $leaps = int( ($y - 1970) / 4 + 0.5 ); (((($y-1970)*365 +$leaps+MONTHS->{$m}+($d-1))*24 +$H)*60 +$M)* +60 +$S - ($tzs eq '-' ? -1 : 1)*$tzh*3600 + $tzm*60; }, inline_c => sub { epoch_sec($date) }, });
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