Advent of Changelog: Day 4

Author: zverok

_src/3.3.md

@@ -54,7 +54,9 @@ description: Ruby 3.3 full and annotated changelog
 
 ### `Module#set_temporary_name`
 
-* **Reason:**
+Allows to assign a string to be rendered as class/module's `#name`, without assigning the class/module to a constant.
+
+* **Reason:** The feature is useful to provide reasonable representation for dynamically auto-generated classes without assigning them to constants (which pollutes the global namespace and might conflict with existing constants) or redefining `Class#name` (which might break other code and not always respected in the output).
 * **Discussion:** [Feature #19521]
 * **Documentation:** [Module#set_temporary_name](https://docs.ruby-lang.org/en/master/Module.html#method-i-set_temporary_name)
 * **Code:**
@@ -164,3 +166,10 @@ description: Ruby 3.3 full and annotated changelog
 * **Code:**
 * **Notes:**
 
+### New `Warning` category: `:performance`
+
+* **Reason:**
+* **Discussion:** [Feature #19538]
+* **Documentation:** [Warning#[category]](https://docs.ruby-lang.org/en/master/Warning.html#method-c-5B-5D)
+* **Code:**
+* **Notes:**