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
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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 |
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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.
-- Ticket URL: <https://svn.boost.org/trac/boost/ticket/9282> Boost C++ Libraries <http://www.boost.org/> Boost provides free peer-reviewed portable C++ source libraries.
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