update

git-svn-id: svn://svn.valgrind.org/valgrind/trunk@5434

diff --git a/docs/internals/performance.txt b/docs/internals/performance.txt
index ff2075c31fd0603685125a0ecf22b87f20f241b8..3691ab8b5864a6e697c157f712bc725805619701 100644 (file)
--- a/docs/internals/performance.txt
+++ b/docs/internals/performance.txt
@@ -23,6 +23,9 @@ Post 3.1.0:
 - Julian changed findSb to slowly move superblocks to the front of the list
   as they were accessed.  This sped up perf/heap by 25--50%, and some big
   programs (eg. ktuberling) programs by a couple of percent.
+- Nick reduced the iteration count of the loop in swizzle() from 20 to 5,
+  which gave almost identical results while saving 2% in perf/tinycc and 10%
+  in perf/heap on a 3GHz Prescott P4.
 
 COMPVBITS branch:
 - Nick converted to compress V bits, initial version saved 0--5% on most