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[Bug libstdc++/77582] Improve std::string::clear performace
- From: "redi at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 23 Sep 2016 17:26:06 +0000
- Subject: [Bug libstdc++/77582] Improve std::string::clear performace
- Auto-submitted: auto-generated
- References: <bug-77582-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77582
--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Fri Sep 23 17:25:34 2016
New Revision: 240447
URL: https://gcc.gnu.org/viewcvs?rev=240447&root=gcc&view=rev
Log:
Avoid reallocation for basic_string::clear()
PR libstdc++/56166
PR libstdc++/77582
* include/bits/basic_string.h (basic_string::clear()): Drop reference
and use empty rep.
* include/ext/rc_string_base.h (__rc_string_base::_M_clear()):
Likewise.
* testsuite/21_strings/basic_string/56166.cc: New.
* testsuite/ext/vstring/modifiers/clear/56166.cc: New.
Added:
trunk/libstdc++-v3/testsuite/21_strings/basic_string/56166.cc
trunk/libstdc++-v3/testsuite/ext/vstring/modifiers/clear/
trunk/libstdc++-v3/testsuite/ext/vstring/modifiers/clear/56166.cc
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/bits/basic_string.h
trunk/libstdc++-v3/include/ext/rc_string_base.h