CHANGELOG.md in emoji_data-0.0.2 vs CHANGELOG.md in emoji_data-0.0.3

@@ -1,12 +1,20 @@
 # Changelog
 
+## 0.0.3 (1 April 2013)
+
+ * On initialization, create hashmaps to cache lookups for `.find_by_unified()`.
+
+   In a quick benchmark in MRI 2.1.1, this reduces the time needed for one million lookups from `13.5s` to `0.3s`!
+
+   This is only for lookup by unified ID for now, since the other `find_by_*()` methods are actually searches that can return multiple values.  I'll look at nested hashmaps for those if there is a pressing performance need later.
+
 ## 0.0.2 (3 December 2013)
 
  * Remove JSON gem dependency since no longer supporting Ruby 1.8.7 anyhow.
  * Add `EmojiData.find_by_str` convenience method to match on a string.
  * Make default `EmojiChar.to_s()` the same as `EmojiChar.char()`
 
 
 ## 0.0.1 (7 June 2013)
 
- * Initial release
\ No newline at end of file
+ * Initial release