- **status**: open --> closed-fixed
- **Comment**:

Fixed in commit a4cece3d47cf09

---
** [bugs:#1397] curl_multi regression since 7.29.0**
**Status:** closed-fixed
**Labels:** multi regression performance 
**Created:** Thu Jul 17, 2014 11:14 AM UTC by Daniel Stenberg
**Last Updated:** Thu Jul 17, 2014 11:14 AM UTC
**Owner:** Daniel Stenberg
[I got this reported privately and the reporter wants to keep its employer's name out of this. I'm filing it here so that I won't forget about this issue.]

https://github.com/bagder/curl/commit/cb3e6dfa3511e75334f70f53370ce3f1d711c904


The above commit introduced a pretty big performance regression when
dealing with large number of requests going through an HTTP proxy + ssl.
I¹ve measured around a 4.5x increase in time spent in the attached
application vs reverting this change.  We noticed the problem when we
upgraded from 7.25 to 7.36 recently and it had a pretty negative impact on
some application logic we have.  With the test application you will need
to change the proxy to your own local one of course.

Without ssl the attached application is very fast for me.. see the
following timings all based off of 7.37.0

time with https:
real    1m24.342s
user    0m12.911s
sys     0m2.362s


time with http:
real    0m1.480s
user    0m0.289s
sys     0m1.019s

time with https and cb3e6dfa3511e75334f70f53370ce3f1d711c904 reverted:
real    0m15.273s
user    0m12.872s
sys     0m2.248s


time with http and cb3e6dfa3511e75334f70f53370ce3f1d711c904 reverted:
real    0m1.441s
user    0m0.285s
sys     0m0.995s

(I'll attach the test application later after editing out sensitive names)
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