Add garbage collection to free memory before running DVC tests

Author: matthijs-deltares

test/deltares_testbench/src/suite/test_set_runner.py

@@ -3,6 +3,7 @@
 Copyright (C)  Stichting Deltares, 2026
 """
 
+import gc
 import multiprocessing
 import os
 import shutil
@@ -107,6 +108,10 @@ def run(self) -> None:
         # Prepare DVC cases: batch-download all .dvc files in one command
         self.__prepare_dvc_test_cases()
 
+        # Free memory accumulated during DVC preparation (repo objects, file
+        # indices, etc.) so the forked worker pool starts with a lean parent.
+        gc.collect()
+
         results = (
             self.run_tests_in_parallel()
             if self.__settings.command_line_settings.parallel