[Bug 1638952] Re: Performance regression on curl-4.47 (16.04 LTS)

[Martin]

** Description changed:

  The frozen version of curl-4.47 on 16.04 LTS has serious performance
  regression caused by bug in state machine which is causing a a poll()
  loop. The symptom of this is high percentage of sys time of a multi
  threaded process. In my case, as much as half of process time was sys
  (aka time spent waiting for network IO). curl-4.50 as it is stable in
  16.10 does not show this behavior  therefore I'd like to request version
  bump to be able to use LTS with fixed curl.
+ 
+ More info about the regression:
+ http://curl.haxx.se/bug/view.cgi?id=1397
+ https://github.com/curl/curl/commit/a4cece3d47cf092da00cf9910e87bb60b9eff533
+ https://github.com/curl/curl/commit/d7e3942814e0c3a24069a0888da4b2431bafe44a

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https://bugs.launchpad.net/bugs/1638952

Title:
  Performance regression on curl-4.47 (16.04 LTS)

Status in curl package in Ubuntu:
  New

Bug description:
  The frozen version of curl-4.47 on 16.04 LTS has serious performance
  regression caused by bug in state machine which is causing a a poll()
  loop. The symptom of this is high percentage of sys time of a multi
  threaded process. In my case, as much as half of process time was sys
  (aka time spent waiting for network IO). curl-4.50 as it is stable in
  16.10 does not show this behavior  therefore I'd like to request
  version bump to be able to use LTS with fixed curl.

  More info about the regression:
  http://curl.haxx.se/bug/view.cgi?id=1397
  https://github.com/curl/curl/commit/a4cece3d47cf092da00cf9910e87bb60b9eff533
  https://github.com/curl/curl/commit/d7e3942814e0c3a24069a0888da4b2431bafe44a

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