fix: added length check for performance

Signed-off-by: prakhar-singh1928 <prakhar.singh1928@ibm.com>

Author: prakhar-singh1928

cpex/framework/memory.py

@@ -195,6 +195,10 @@ def __eq__(self, other: Any) -> bool:
         if not isinstance(other, Mapping):
             return NotImplemented
 
+        # Fast-path: if lengths differ, mappings cannot be equal
+        if len(self) != len(other):
+            return False
+        
         # Compare materialized items
         return dict(self.items()) == dict(other.items())