[tor-bugs] #22990 [Metrics/Library]: Add a heartbeat log message indicating progress and estimated time left

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#22990: Add a heartbeat log message indicating progress and estimated time left
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 Reporter:  karsten          |          Owner:  iwakeh
     Type:  enhancement      |         Status:  needs_review
 Priority:  Medium           |      Milestone:
Component:  Metrics/Library  |        Version:
 Severity:  Normal           |     Resolution:
 Keywords:  metrics-2017     |  Actual Points:
Parent ID:                   |         Points:
 Reviewer:                   |        Sponsor:
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Changes (by karsten):

 * status:  accepted => needs_review


Comment:

 Please review [https://gitweb.torproject.org/user/karsten/metrics-
 lib.git/commit/?h=task-22990&id=bd524553f149abd5de299a0e9a5820e6bf7d38cf
 commit bd52455 in my task-22990 branch].

 We could probably do more, but this patch turned out to be quite useful
 already to test my #24218 implementation. I could imagine postponing
 future improvements until we see a need for them. But if you have further
 ideas that are relatively easy to implement, let's do them, too.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/22990#comment:7>
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