[issue29312] Use FASTCALL in dict.update()

[Inada Naoki]

Inada Naoki <songofacandy at gmail.com> added the comment:

How can we avoid unpacking dict in case of d1.update(**d2)?

----------

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue29312>
_______________________________________