From 3b5bc0ddfbcdd17ef47d61fbce7a265b219a5889 Mon Sep 17 00:00:00 2001 From: Father Chrysostomos Date: Sun, 25 Nov 2012 14:31:04 -0800 Subject: [PATCH] English.pm: Update -no_match_vars docs --- lib/English.pm | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/lib/English.pm b/lib/English.pm index 1f1e85d..6a57ffb 100644 --- a/lib/English.pm +++ b/lib/English.pm @@ -11,8 +11,9 @@ English - use nice English (or awk) names for ugly punctuation variables =head1 SYNOPSIS - use English qw( -no_match_vars ) ; # Avoids regex performance penalty use English; + use English qw( -no_match_vars ) ; # Avoids regex performance penalty + # in perl 5.16 and earlier ... if ($ERRNO =~ /denied/) { ... } @@ -32,6 +33,10 @@ See L for a complete list of these. =head1 PERFORMANCE +NOTE: This was fixed in perl 5.18. Mentioning these three variables no +longer makes a speed difference. This section still applies if your code +is to run on perl 5.16 or earlier. + This module can provoke sizeable inefficiencies for regular expressions, due to unfortunate implementation details. If performance matters in your application and you don't need $PREMATCH, $MATCH, or $POSTMATCH, -- 2.7.4