Increases CPU utilization based on os count.

evaluate_genericify_cpp.py

@@ -122,7 +122,8 @@ class EvaluateGenericifyCpp(evaluate.Metric):
         k=[1, 10, 100],
     ):
         """Returns the scores"""
-        num_workers = 4
+        num_workers = os.cpu_count()
+        num_workers = num_workers if not num_workers else 8
 
         if os.getenv("HF_ALLOW_CODE_EVAL", default=0) != "1":
             raise ValueError(_WARNING)