setting time when loading (+ decrease time required for test_cooling)

src/wrapper.c

@@ -54,6 +54,7 @@ PyMODINIT_FUNC PyInit_wrapper(void)
 {
   PyObject *m;
 
+  clocks_set_cpufreq(0);
   import_array();
   Py_Initialize();
   m = PyModule_Create(&wrapper_cmodule);

test/test_cooling.py

@@ -19,8 +19,8 @@ gamma = 5. / 3.
 filename = "test/cooling.yml"
 
 # number of points
-N_rho = 3000
-N_T = 3000
+N_rho = 300
+N_T = 300
 
 # density in atom / cm3
 if N_rho == 1: