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https://issues.apache.org/jira/browse/STDCXX-226?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Martin Sebor updated STDCXX-226:
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Attachment: benchmark-stdcxx-226.c
Attached simple benchmark program to compare the runtime performance of the
three approaches discussed in the issue. Compiled with any C compiler, run as
follows:
$ time ./a.out [ 0 | 1 | 2 ] N
0 for the original algorithm
1 for the algorithm implemented in the attached patch
2 for the reciprocal multiplication approach
N the number of iterations (unsigned long)
> __rw::__rw_new_capacity() uses floating point math
> --------------------------------------------------
>
> Key: STDCXX-226
> URL: https://issues.apache.org/jira/browse/STDCXX-226
> Project: C++ Standard Library
> Issue Type: Improvement
> Components: 23. Containers
> Affects Versions: 4.1.2, 4.1.3, 4.2.0
> Environment: all
> Reporter: Martin Sebor
> Assignee: Farid Zaripov
> Fix For: 4.2.1
>
> Attachments: benchmark-stdcxx-226.c, new_capacity.patch
>
>
> Moved from the Rogue Wave bug tracking database:
> ****Created By: sebor @ May 09, 2002 11:15:41 AM****
> The template __rw_new_capacity() uses floating point arithmetic which may be
> less efficient than integer arithmetic on some architectures. Need to change
> to integer arithmetic and correctly handle integer overflow.
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