From: Nicholas Clark <nick@ccl4.org>
Date: Sun, 29 Oct 2006 18:23:01 +0000 (+0000)
Subject: I shrunk struct context, so remove it from perltodo.
X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=commitdiff_plain;h=65c444ad9fe5f91a61ff1b7dcf47f383cf2a0f8a;p=p5sagit%2Fp5-mst-13.2.git

I shrunk struct context, so remove it from perltodo.

p4raw-id: //depot/perl@29128
---

diff --git a/pod/perltodo.pod b/pod/perltodo.pod
index 7b0bcd7..c85174e 100644
--- a/pod/perltodo.pod
+++ b/pod/perltodo.pod
@@ -380,23 +380,6 @@ as part of exercising your skills with coverage and profiling tools you might
 want to determine what ops I<really> are the most commonly used. And in turn
 suggest evictions and promotions to achieve a better F<pp_hot.c>.
 
-=head2 Shrink struct context
-
-In F<cop.h>, we have
-
-    struct context {
-        U32		cx_type;	/* what kind of context this is */
-        union {
-    	struct block	cx_blk;
-    	struct subst	cx_subst;
-        } cx_u;
-    };
-
-There are less than 256 values for C<cx_type>, and the constituent parts
-C<struct block> and C<struct subst> both contain some C<U8> and C<U16> fields,
-so it should be possible to move them to the first word, and share space with
-a C<U8> C<cx_type>, saving 1 word.
-
 =head2 Allocate OPs from arenas
 
 Currently all new OP structures are individually malloc()ed and free()d.