unix: fast: Set initial module dict size big to have high pystone score.

For this, introduce MICROPY_MODULE_DICT_SIZE config setting.

py/mpconfig.h

@@ -100,6 +100,11 @@
 #define MICROPY_ALLOC_PATH_MAX (512)
 #endif
 
+// Initial size of module dict
+#ifndef MICROPY_MODULE_DICT_SIZE
+#define MICROPY_MODULE_DICT_SIZE (1)
+#endif
+
 /*****************************************************************************/
 /* Micro Python emitters                                                     */
 

py/objmodule.c

@@ -96,7 +96,7 @@ mp_obj_t mp_obj_new_module(qstr module_name) {
     mp_obj_module_t *o = m_new_obj(mp_obj_module_t);
     o->base.type = &mp_type_module;
     o->name = module_name;
-    o->globals = mp_obj_new_dict(1);
+    o->globals = mp_obj_new_dict(MICROPY_MODULE_DICT_SIZE);
 
     // store __name__ entry in the module
     mp_obj_dict_store(o->globals, MP_OBJ_NEW_QSTR(MP_QSTR___name__), MP_OBJ_NEW_QSTR(module_name));

unix/mpconfigport_fast.h

@@ -30,3 +30,6 @@
 
 #include <mpconfigport.h>
 #define MICROPY_PY___FILE__ (0)
+// 91 is a magic number proposed by @dpgeorge, which make pystone run ~ at tie
+// with CPython 3.4.
+#define MICROPY_MODULE_DICT_SIZE (91)