from timeit import timeit

numBaseClasses = (1, 2, 5, 10, 20, 50, 100)

setup = '''
class MetaClass(type):
    pass

class BaseClass:
    def __init__(self):
        self.attr = None

additionalBases = [type(f'BaseClass{i}', (), {})
                   for i in range(100)]

additionalBasesRec = []
for i in range(100):
    baseClasses = (additionalBasesRec[i-1],) if i else ()
    additionalBasesRec.append(type(f'BaseClass{i}', baseClasses, {}))

noMetaBaseX = {
    i: type(f'TestClass{i}', (BaseClass, *additionalBases[:i-1]), {})()
    for i in %(numBaseClasses)s}

metaBaseX = {
    i: MetaClass(f'TestClassMeta{i}', (BaseClass, *additionalBases[:i-1]), {})()
    for i in %(numBaseClasses)s}

noMetaRecBaseX = {
    i: type(f'TestClassRecBase{i}', (BaseClass, additionalBasesRec[i-1]), {})()
    for i in %(numBaseClasses)s}

metaRecBaseX = {
    i: MetaClass(f'TestClassMetaRecBase{i}', (BaseClass, additionalBasesRec[i-1]), {})()
    for i in %(numBaseClasses)s}

''' % {'numBaseClasses': numBaseClasses}
  
stmts = [f'{testDict}[{i}].attr'
         for testDict in ['noMetaBaseX', 'metaBaseX', 'noMetaRecBaseX', 'metaRecBaseX']
         for i in numBaseClasses]

number = 10**7

for stmt in stmts:
    total = timeit(stmt=stmt, setup=setup, number=number)
    print(f'{total/number:.6e} {stmt}')