update README.md

Author: codereptile

README.md

@@ -81,4 +81,5 @@ Easiest example is `operator <<` which in most parsers is registered as a `binar
 * **If an included library is not found, some code may be absent!!! (this can be partually avoided by commenting the problematic include)**
 * No way to add libraries that shouldn't be rendered
 * No switch case support
-* Operator calls are not detected, even if they are user-defined
+* Operator calls are not detected, even if they are user-defined
+* On large projects moving/resizing is quite CPU-intensive and takes significant time