From: Father Chrysostomos <sprout@cpan.org>
Date: Tue, 27 Nov 2012 15:08:08 +0000 (-0800)
Subject: [Merge] New COW mechanism
X-Git-Tag: v5.17.7~248
X-Git-Url: https://perl5.git.perl.org/perl5.git/commitdiff_plain/cd298ce42eb3c82a651608c3fbd658ec616b0297

[Merge] New COW mechanism

This branch makes string copying faster by introducing a new copy-on-
write mechanism.  A reference count for the string buffer is now
stored inside the string buffer itself.  This can be disabled with
-Accflags=-DPERL_NO_COW.

It also disables the PL_sawampersand mechanism, as copy-on-write
can now be used for the pre-match ‘copy’, resulting in no slow-
down from using $& and f(r)iends.  This can be reënabled with
-Accflags=-DPERL_SAWAMPERSAND.
---

cd298ce42eb3c82a651608c3fbd658ec616b0297