1 files changed, 25 insertions, 0 deletions
diff --git a/activesupport/CHANGELOG.md b/activesupport/CHANGELOG.md
index c00cbaaa08..be97b744c8 100644
--- a/activesupport/CHANGELOG.md
+++ b/activesupport/CHANGELOG.md
@@ -1,3 +1,28 @@
+*   Remove 'cow' => 'kine' irregular inflection from default inflections.
+
+    *Andrew White*
+
+*   Add `DateTime#to_s(:iso8601)` and `Date#to_s(:iso8601)` for consistency.
+
+    *Andrew White*
+
+*   Add `Time#to_s(:iso8601)` for easy conversion of times to the iso8601 format for easy Javascript date parsing.
+
+    *DHH*
+
+*   Improve `ActiveSupport::Cache::MemoryStore` cache size calculation.
+    The memory used by a key/entry pair is calculated via `#cached_size`:
+
+        def cached_size(key, entry)
+          key.to_s.bytesize + entry.size + PER_ENTRY_OVERHEAD
+        end
+
+    The value of `PER_ENTRY_OVERHEAD` is 240 bytes based on an [empirical
+    estimation](https://gist.github.com/ssimeonov/6047200) for 64-bit MRI on
+    1.9.3 and 2.0. GH#11512
+
+    *Simeon Simeonov*
+
 *   Only raise `Module::DelegationError` if it's the source of the exception.
 
     Fixes #10559