update comment

Author: hughperkins

genesis/__init__.py

@@ -50,7 +50,7 @@ def init(
     backend=None,
     theme="dark",
     logger_verbose_time=False,
-    performance_mode: bool = False,  # True: compilation ~6x slower, but runs ~1-10% faster
+    performance_mode: bool = False,  # True: compilation up to 6x slower (GJK), but runs ~1-5% faster
 ):
     # Consider Genesis as initialized right away
     global _initialized