Update changelog

Author: gdevic

CHANGELOG.md

@@ -6,6 +6,10 @@ The format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/)
 
 ## [Unreleased]
 
+### Improved
+- Massive performance boost of ~2x
+  - On i7-13700K @5.3GHz the simulation runs at 10.3kHz
+
 ## [1.07] - 2025-11-09
 ### Added
 - New implementation of the schematic code