Created
December 20, 2018 15:43
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Ugly script for comparing objects with/without __slots__
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| from pympler import asizeof | |
| def list_to_str(lst): | |
| str = '' | |
| for val in lst: | |
| str = str + val + ', ' | |
| return str[0:len(str)-2] | |
| def list_to_slots_str(lst): | |
| str = '' | |
| for val in lst: | |
| str += "'{}',".format(val) | |
| return str[0:len(str)-1] | |
| def dict_to_str(dct): | |
| str = '' | |
| for name, value in dct.items(): | |
| str += "{}='{}',".format(name, value) | |
| return str[0:len(str)-1] | |
| class_def = '''class {}(): | |
| ''' | |
| slots_def = ''' __slots__ = {} | |
| ''' | |
| init_def = ''' def __init__(self, {}): | |
| ''' | |
| attr_def = ''' self.{} = '{}' | |
| ''' | |
| for i in range(1,250): | |
| attr_names = ['attr'+str(x) for x in range(1,i+1)] | |
| attrs = {name: j for j,name in enumerate(attr_names)} | |
| attrs_names_str = list_to_str(attr_names) | |
| attrs_str = dict_to_str(attrs) | |
| class_name = 'TheUsualClass' + str(i) | |
| class_str = class_def.format(class_name) | |
| class_str += init_def.format(attrs_names_str) | |
| for attr, value in attrs.items(): | |
| class_str += attr_def.format(attr, value) | |
| exec(class_str) | |
| a = eval('{}({})'.format(class_name, attrs_str)) | |
| no_slots_size = asizeof.asizeof(a) | |
| class_name = 'TheSlotsClass' + str(i) | |
| class_str = class_def.format(class_name) | |
| class_str += slots_def.format(list_to_slots_str(attr_names)) | |
| class_str += init_def.format(attrs_names_str) | |
| for attr, value in attrs.items(): | |
| class_str += attr_def.format(attr, value) | |
| exec(class_str) | |
| a = eval('{}({})'.format(class_name, attrs_str)) | |
| with_slots_size = asizeof.asizeof(a) | |
| print('{}. slots version: {}, no slots: {}, ratio {}: '.format( i, | |
| round(with_slots_size,2), | |
| round(no_slots_size,2), | |
| round(no_slots_size/with_slots_size,2)) | |
| ) |
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objsize.get_deep_size as alternative way