Optimize BSSN EScalar GPU path baseline

makefile_and_run.py

@@ -152,6 +152,9 @@ def _gpu_runtime_env():
         "AMSS_CUDA_AMR_RESTRICT_BATCH": "0",
         "AMSS_CUDA_DEVICE_SEGMENT_BATCH": "0",
     }
+    if getattr(input_data, "Equation_Class", "") == "Z4C":
+        defaults["AMSS_CUDA_Z4C_KEEP_RESIDENT_AFTER_STEP"] = "0"
+        defaults["AMSS_CUDA_KEEP_ALL_LEVELS"] = "0"
     for key, value in defaults.items():
         runtime_env.setdefault(key, value)