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py/runtime: Make sys.modules preallocate to a configurable size.

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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).
This commit is contained in:
matejcik 2021-03-22 11:20:22 +01:00 committed by Damien George
parent b26def0644
commit 1a2ffda175
2 changed files with 6 additions and 1 deletions
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5
py/mpconfig.h
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@ -229,6 +229,11 @@
#define MICROPY_MODULE_DICT_SIZE (1)
#endif
// Initial size of sys.modules dict
#ifndef MICROPY_LOADED_MODULES_DICT_SIZE
#define MICROPY_LOADED_MODULES_DICT_SIZE (3)
#endif
// Whether realloc/free should be passed allocated memory region size
// You must enable this if MICROPY_MEM_STATS is enabled
#ifndef MICROPY_MALLOC_USES_ALLOCATED_SIZE

2
py/runtime.c
View File

@ -91,7 +91,7 @@ void mp_init(void) {
#endif
// init global module dict
mp_obj_dict_init(&MP_STATE_VM(mp_loaded_modules_dict), 3);
mp_obj_dict_init(&MP_STATE_VM(mp_loaded_modules_dict), MICROPY_LOADED_MODULES_DICT_SIZE);
// initialise the __main__ module
mp_obj_dict_init(&MP_STATE_VM(dict_main), 1);