Updated changelog.
diff --git a/CHANGES.txt b/CHANGES.txt
index ef79313..99d9ad7 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -9,9 +9,32 @@
* For iterator-pair function parameter types, take both iterators by value.
* Code-space savings and perhaps some modest performance improvements in
RepeatedPtrField.
+ * Eliminate nullptr check from every tag parse.
+ * Remove unused _$name$_cached_byte_size_ fields.
+ * Serialize extension ranges together when not broken by a proto field in the
+ middle.
+ * Do out-of-line allocation and deallocation of string object in ArenaString.
+ * Streamline ParseContext::ParseMessage<T> to avoid code bloat and improve
+ performance.
+ * New member functions RepeatedField::Assign, RepeatedPtrField::{Add, Assign}.
+ * Fix undefined behavior warning due to innocuous uninitialization of value
+ on an error path.
+ * Avoid expensive inlined code space for encoding message length for messages
+ >= 128 bytes and instead do a procedure call to a shared out-of-line routine.
Java:
- * Exceptions thrown while reading from an InputStream in parseFrom are now included as causes.
+ * Exceptions thrown while reading from an InputStream in parseFrom are now
+ included as causes.
+ * Support potentially more efficient proto parsing from RopeByteStrings.
+ * Clarify runtime of ByteString.Output.toStringBuffer().
+
+ Python
+ * Fixed a bug in text format where a trailing colon was printed for repeated field.
+ * When TextFormat encounters a duplicate message map key, replace the current
+ one instead of merging.
+
+ JavaScript
+ * Make Any.pack() chainable.
2021-03-10 version 3.15.6 (C++/Java/Python/PHP/Objective-C/C#/Ruby/JavaScript)
