[tor-bugs] #28596 [Core Tor/sbws]: Use the latest descriptor bandwidths for torflow weighting

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#28596: Use the latest descriptor bandwidths for torflow weighting
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 Reporter:  teor           |          Owner:  (none)
     Type:  defect         |         Status:  new
 Priority:  Medium         |      Milestone:  sbws 1.0 (MVP must)
Component:  Core Tor/sbws  |        Version:  sbws: 1.0.0
 Severity:  Normal         |     Resolution:
 Keywords:                 |  Actual Points:
Parent ID:  #28588         |         Points:
 Reviewer:                 |        Sponsor:
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Comment (by starlight):

 The local tor daemon used by SBWS can be configured to keep current-hour
 server descriptors cached and v3bwfile.py could pull all relay descriptors
 cheaply whenever it runs. Takes about one second to execute `curl -s -o
 descriptors http://127.0.0.1:9030/tor/server/all`

 Obtaining through STEM may take a little more time, but should be
 inexpensive. Perhaps not worth the effort to ever bother creating
 continuous update logic.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/28596#comment:2>
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