[tahoe-lafs-trac-stream] [Tahoe-LAFS] #2995: Stop copying dictionary keys so frequently in the magic-folder frontend

[Tahoe-LAFS]

#2995: Stop copying dictionary keys so frequently in the magic-folder frontend
---------------------+---------------------------
 Reporter:  exarkun  |          Owner:
     Type:  defect   |         Status:  new
 Priority:  normal   |      Milestone:  undecided
Component:  unknown  |        Version:  1.12.1
 Keywords:           |  Launchpad Bug:
---------------------+---------------------------
 Several areas in the magic-folder frontend implementation make unnecessary
 copies of the keys of a dictionary (to iterate over them).

 The copy is not free and because it is unnecessary this makes it wasteful.
 Get rid of the copying.

--
Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/2995>
Tahoe-LAFS <https://Tahoe-LAFS.org>
secure decentralized storage