Rev 3780: NEWS entry about btree prefetch. in http://bzr.arbash-meinel.com/branches/bzr/1.8-dev/btree_buffer

[John Arbash Meinel]

At http://bzr.arbash-meinel.com/branches/bzr/1.8-dev/btree_buffer

------------------------------------------------------------
revno: 3780
revision-id: john at arbash-meinel.com-20081028194342-7rrdfadt13mg82jy
parent: john at arbash-meinel.com-20081028193957-zg2eygq5cgz2bnpu
committer: John Arbash Meinel <john at arbash-meinel.com>
branch nick: btree_buffer
timestamp: Tue 2008-10-28 14:43:42 -0500
message:
  NEWS entry about btree prefetch.
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=== modified file 'NEWS'
--- a/NEWS	2008-10-28 17:41:35 +0000
+++ b/NEWS	2008-10-28 19:43:42 +0000
@@ -16,6 +16,13 @@
 
   IMPROVEMENTS:
 
+    * ``BTreeIndex`` code now is able to prefetch extra pages to help tune
+      the tradeoff between bandwidth and latency. Should be tuned
+      appropriately to not impact commands which need minimal information,
+      but provide a significant boost to ones that need more context. Only
+      has a direct impact on the ``--development2`` format which uses
+      btree's for the indexes. (John Arbash Meinel)
+
     * ``bzr dump-btree`` is a hidden command introduced to allow dumping
       the contents of a compressed btree file.  (John Arbash Meinel)