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[v3] Add segmented-iterator optimization for std::copy of deque::iterator ranges

From: Paolo Carlini <paolo dot carlini at oracle dot com>
To: "gcc-patches at gcc dot gnu dot org" <gcc-patches at gcc dot gnu dot org>
Cc: libstdc++ <libstdc++ at gcc dot gnu dot org>
Date: Wed, 23 Dec 2009 18:12:46 +0100
Subject: [v3] Add segmented-iterator optimization for std::copy of deque::iterator ranges

Hi,

for a long time in my todo list. On an i7-920 the performance
improvement for the smalll testcase added to the performance testsuite
is about 4x.

Tested x86_64-linux multilib, committed to mainline.

Paolo.

//////////////////////

Attachment: CL_copy_deque
Description: Text document

Attachment: patch_copy_deque
Description: Text document

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