From: Dmitriy Vyukov <dvyukov@google.com>
Date: Wed, 26 Mar 2014 11:03:58 +0000 (+0400)
Subject: runtime: minor improvement of string scanning
X-Git-Tag: go1.3beta1~264
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=40f5e67571d6ce299140638e40bea6b00cc76330;p=gostls13.git

runtime: minor improvement of string scanning
If we set obj, then it will be enqueued for marking at the end of the scanning loop.
This is not necessary, since we've already marked it.
This can wait for 1.4 if you wish.

LGTM=rsc
R=rsc
CC=golang-codereviews
https://golang.org/cl/80030043
---

diff --git a/src/pkg/runtime/mgc0.c b/src/pkg/runtime/mgc0.c
index c16bac1a0d..ec6712cbf9 100644
--- a/src/pkg/runtime/mgc0.c
+++ b/src/pkg/runtime/mgc0.c
@@ -913,10 +913,8 @@ scanblock(Workbuf *wbuf, bool keepworking)
 
 		case GC_STRING:
 			stringptr = (String*)(stack_top.b + pc[1]);
-			if(stringptr->len != 0) {
-				obj = stringptr->str;
-				markonly(obj);
-			}
+			if(stringptr->len != 0)
+				markonly(stringptr->str);
 			pc += 2;
 			continue;