diff --git a/binarycpython/utils/grid.py b/binarycpython/utils/grid.py
index 136b89112610a7f336e97aa43d48046909ca5145..d9509893c7cc38a9ba5913255313456ecefa43a1 100644
--- a/binarycpython/utils/grid.py
+++ b/binarycpython/utils/grid.py
@@ -726,7 +726,7 @@ class Population(object):
 
 
         # Execute
-        r = list(p.imap_unordered(evolve_system, yield_system(), chunksize=100))
+        r = list(p.imap_unordered(evolve_system, yield_system(), chunksize=1000))
 
         stop_mp = time.time()
 
diff --git a/tests/population/scaling/evolve_population_comparing_with_multiprocessing.py b/tests/population/scaling/evolve_population_comparing_with_multiprocessing.py
index 62e9da962f806e356eaa6f03ee8096d9204baa10..4e95fb0eb43d6c02863b6993e6834217a08c8bcb 100644
--- a/tests/population/scaling/evolve_population_comparing_with_multiprocessing.py
+++ b/tests/population/scaling/evolve_population_comparing_with_multiprocessing.py
@@ -125,7 +125,7 @@ test_pop.add_grid_variable(
 # MP
 total_mp_start = time.time()
 
-# evolve_mp_time = test_pop.test_evolve_population_mp()
+#evolve_mp_time = test_pop.test_evolve_population_mp()
 evolve_mp_time = test_pop.test_evolve_population_mp_chunks()
 
 total_mp_stop = time.time()