Some more cython optimizations ?

While working on ChunkedBuffer:

https://github.com/tzickel/chunkedbuffer

I think it's for calling python methods which are already bound to a Python object, it's faster to do instead of (check the annotated output):

self._bufs_popleft(...)

this:

with cython.optimize.unpack_method_calls(False):
    self._bufs_popleft(...)

^^- but it's better to leave it though for calling other stuff, like when calling an .find directly.

Also instead of:

self._bufs = collections.deque()

it's less code

from collections import deque
self._bufs = deque()

Start with ChunkedBuffer and the linked chunkedbuffer project, then inspect the annotated output for the _bufs_popleft and collections.deque examples. Compare the proposed Cython optimization changes against the current behavior and performance; done means the worthwhile optimizations are identified and validated without changing behavior.