[Boost-bugs] [Boost C++ Libraries] #9282: performance regression in boost::unordered on 64-bit platforms

Subject: [Boost-bugs] [Boost C++ Libraries] #9282: performance regression in boost::unordered on 64-bit platforms
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2013-10-22 02:12:50

#9282: performance regression in boost::unordered on 64-bit platforms
------------------------------------------------+-------------------------
 Reporter:  aiapub-cpp@…                        |      Owner:  danieljames
     Type:  Bugs                                |     Status:  new
Milestone:  To Be Determined                    |  Component:  unordered
  Version:  Boost 1.53.0                        |   Severity:  Regression
 Keywords:  unordered mix64_policy performance  |
------------------------------------------------+-------------------------
 On 64-bit platforms boost::unordered containers use 'mix64_policy' which
 doesn't grow the bucket count as fast as the 'prime' version. That makes
 adding items to an empty/'non-reserved' container extremely slow. Changing
 new_bucket_count/prev_bucket_count should fix the problem. Versions
 affected: 1.50 and above.

 Regards,
 - Ildar.

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Ticket URL: <https://svn.boost.org/trac/boost/ticket/9282>
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