py/runtime: Make sys.modules preallocate to a configurable size.
This allows configuring the pre-allocated size of sys.modules dict, in order to prevent unwanted reallocations at run-time (3 sys-modules is really not quite enough for a larger project).
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@ -229,6 +229,11 @@
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#define MICROPY_MODULE_DICT_SIZE (1)
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#endif
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// Initial size of sys.modules dict
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#ifndef MICROPY_LOADED_MODULES_DICT_SIZE
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#define MICROPY_LOADED_MODULES_DICT_SIZE (3)
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#endif
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// Whether realloc/free should be passed allocated memory region size
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// You must enable this if MICROPY_MEM_STATS is enabled
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#ifndef MICROPY_MALLOC_USES_ALLOCATED_SIZE
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@ -91,7 +91,7 @@ void mp_init(void) {
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#endif
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// init global module dict
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mp_obj_dict_init(&MP_STATE_VM(mp_loaded_modules_dict), 3);
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mp_obj_dict_init(&MP_STATE_VM(mp_loaded_modules_dict), MICROPY_LOADED_MODULES_DICT_SIZE);
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// initialise the __main__ module
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mp_obj_dict_init(&MP_STATE_VM(dict_main), 1);
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