>>> import dis
>>> 
>>> def f():
...     l = []
...     for i in range(42):
...         l.append(i)
... 
>>> f()  # Quicken...
>>> f()  # Specialize...
>>> 
>>> dis.dis(f, adaptive=True, show_caches=True)
  1           0 RESUME_QUICK                      0

  2           2 BUILD_LIST                        0
              4 STORE_FAST                        0 (l)

  3           6 LOAD_GLOBAL_BUILTIN               1 (NULL + range)
              8 CACHE                             0 (counter: 53)
             10 CACHE                             0 (index: 70)
             12 CACHE                             0 (module_keys_version: 62)
             14 CACHE                             0
             16 CACHE                             0 (builtin_keys_version: 26)
             18 LOAD_CONST                        1 (42)
             20 PRECALL_BUILTIN_CLASS             1
             22 CACHE                             0 (counter: 53)
             24 CALL_ADAPTIVE                     1
             26 CACHE                             0 (counter: 0)
             28 CACHE                             0 (func_version: 0)
             30 CACHE                             0
             32 CACHE                             0 (min_args: 0)
             34 GET_ITER
             36 FOR_ITER                         23 (to 84)
             38 STORE_FAST__LOAD_FAST             1 (i)

  4          40 LOAD_FAST                         0 (l)
             42 LOAD_METHOD_NO_DICT               1 (append)
             44 CACHE                             0 (counter: 53)
             46 CACHE                             0 (type_version: 3)
             48 CACHE                             0
             50 CACHE                             0 (dict_offset: 0)
             52 CACHE                             0 (keys_version: 0)
             54 CACHE                             0
             56 CACHE                             0 (descr: 140374364819376)
             58 CACHE                             0
             60 CACHE                             0
             62 CACHE                             0
             64 LOAD_FAST                         1 (i)
             66 PRECALL_NO_KW_LIST_APPEND         1
             68 CACHE                             0 (counter: 53)
             70 CALL_ADAPTIVE                     1
             72 CACHE                             0 (counter: 0)
             74 CACHE                             0 (func_version: 0)
             76 CACHE                             0
             78 CACHE                             0 (min_args: 0)
             80 POP_TOP
             82 JUMP_BACKWARD_QUICK              24 (to 36)

  3     >>   84 LOAD_CONST                        0 (None)
             86 RETURN_VALUE