Some fixes for the most recent release notes.
diff --git a/CHANGES.txt b/CHANGES.txt
index 3023c81..c3503fc 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -1,4 +1,4 @@
-2015-08-26 version 3.0.0-beta-1 (C++/Java/Python/Ruby/Nano/Objective-C/C#/JavaScript)
+2015-12-30 version 3.0.0-beta-2 (C++/Java/Python/Ruby/Nano/Objective-C/C#/JavaScript)
General
* Introduced a new language implementation: JavaScript.
* Added a new field option "json_name". By default proto field names are
@@ -35,6 +35,10 @@
and a few well-known types except for Any and Struct.
* Added runtime support for Any, Timestamp, Duration and FieldMask.
* [ ] is now accepted for repeated scalar fields in text format parser.
+ * Map fields now have proper O(1) performance for lookup/insert/delete
+ when using the Python/C++ implementation. They were previously using O(n)
+ search-based algorithms because the C++ reflection interface didn't
+ support true map operations.
Objective-C (Beta)
* Various bug-fixes and code tweaks to pass more strict compiler warnings.