[Sablevm-bugs] [ sablevm-Bugs-652416 ] Minor optimization for new object alloc.

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Bugs item #652416, was opened at 2002-12-11 20:21
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=105523&aid=652416&group_id=5523

Category: Execution Problem
Group: SableVM
Status: Open
Resolution: None
Priority: 5
Submitted By: Archie Cobbs (archiecobbs)
>Assigned to: Etienne M. Gagnon (egagnon)
Summary: Minor optimization for new object alloc.

Initial Comment:
Why not this patch? memset() is often a lot faster than
loops, as the
compiler may know how to optimize specially for it...
if so this patch
should speed up every new object allocation.


--- src/libsablevm/gc_copying.c.orig    Tue Dec 10
11:51:13 2002
+++ src/libsablevm/gc_copying.c Tue Dec 10 11:51:34 2002
@@ -1054,14 +1054,7 @@
       return JNI_ERR;
     }
 
-  {
-    size_t i;
-
-    for (i = 0; i < instance_size; i++)
-      {
-       ((char *) result)[i] = 0;
-      }
-  }
+  memset(result, 0, instance_size);
 
   *pinstance = result;
 


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