perldelta man page on AIX

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PERLDELTA(1)	       Perl Programmers Reference Guide		  PERLDELTA(1)

NAME
       perldelta - what is new for perl v5.8.9

DESCRIPTION
       This document describes differences between the 5.8.8 release and the
       5.8.9 release.

Incompatible Changes
       There are no changes incompatible with 5.8.8.

Core Enhancements
Modules and Pragmata
Utility Changes
New Documentation
Performance Enhancements
       ·   The default since perl 5.000 has been for perl to create an empty
	   scalar with every new typeglob. The increased use of lexical vari‐
	   ables means that most are now unused. Thanks to Nicholas Clark's
	   efforts, Perl can now be compiled with "-DPERL_DONT_CREATE_GVSV" to
	   avoid creating these empty scalars.	This will significantly
	   decrease the number of scalars allocated for all configurations,
	   and the number of scalars that need to be copied for ithread cre‐
	   ation. Whilst this option is binary compatible with existing perl
	   installations, it does change a long-standing assumption about the
	   internals, hence it is not enabled by default, as some third party
	   code may rely on the old behaviour.

	   We would recommend testing with this configuration on new deploy‐
	   ments of perl, particularly for multi-threaded servers, to see
	   whether all third party code is compatible with it, as this config‐
	   uration may give useful performance improvements. For existing
	   installations we would not recommend changing to this configuration
	   unless thorough testing is performed before deployment.

Installation and Configuration Improvements
Selected Bug Fixes
New or Changed Diagnostics
Changed Internals
New Tests
Known Problems
Platform Specific Problems
Reporting Bugs
       If you find what you think is a bug, you might check the articles
       recently posted to the comp.lang.perl.misc newsgroup and the perl bug
       database at http://bugs.perl.org.  There may also be information at
       http://www.perl.org, the Perl Home Page.

       If you believe you have an unreported bug, please run the perlbug pro‐
       gram included with your release.	 Be sure to trim your bug down to a
       tiny but sufficient test case.  Your bug report, along with the output
       of "perl -V", will be sent off to perlbug@perl.org to be analysed by
       the Perl porting team.  You can browse and search the Perl 5 bugs at
       http://bugs.perl.org/

SEE ALSO
       The Changes file for exhaustive details on what changed.

       The INSTALL file for how to build Perl.

       The README file for general stuff.

       The Artistic and Copying files for copyright information.

perl v5.8.8			  2008-09-19			  PERLDELTA(1)
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