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Ulf Hermann 9366a8be1e Add an early-out to QVector::operator+= and QHash::unite for empty LHS 
If the container being added to is default constructed and has never
been modified, we don't have to do all the checking and iterating.
Instead we can just assign with operator=.

If the LHS is merely empty, we could lose reserve()d capacity, so only
do this for a shared-null LHS.

Change-Id: If1e3342662d10833babc7ab847ada0285073723b
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
Reviewed-by: Milian Wolff <milian.wolff@kdab.com>
2016-04-28 07:26:52 +00:00
bin Merge remote-tracking branch 'origin/5.6.0' into 5.7 2016-03-07 17:08:56 +01:00
config.tests Windows/Configure tests: Test for DirectWrite2 more extensively. 2016-04-26 11:14:48 +00:00
dist Add changelog for 5.6.0 2016-03-01 11:23:43 +00:00
doc Merge remote-tracking branch 'origin/5.6' into 5.7 2016-04-07 10:47:20 +02:00
examples Merge remote-tracking branch 'origin/5.6' into 5.7 2016-04-27 09:18:05 +02:00
lib Purge all fonts 2015-08-18 19:59:14 +00:00
mkspecs iOS: Handle old exclusive build CONFIG names for simulator and device 2016-04-26 11:33:22 +00:00
qmake Merge remote-tracking branch 'origin/5.6' into 5.7 2016-04-25 14:03:45 +02:00
src Add an early-out to QVector::operator+= and QHash::unite for empty LHS 2016-04-28 07:26:52 +00:00
tests Optimize convert_Indexed8_to_X32 2016-04-27 22:01:32 +00:00
tools Disable Directwrite 2 when Directwrite is disabled 2016-04-26 12:17:37 +00:00
util Re-generate QLocale data from CLDR v29 2016-04-08 03:51:18 +00:00
.gitattributes Update the git-archive export options 2012-09-07 15:39:31 +02:00
.gitignore rewrite qtAddToolEnv() 2016-01-08 09:36:13 +00:00
.qmake.conf Bump version 2016-02-18 07:38:22 +00:00
.tag Update the git-archive export options 2012-09-07 15:39:31 +02:00
configure Merge remote-tracking branch 'origin/5.6' into 5.7 2016-04-25 14:03:45 +02:00
configure.bat Add initial clang-cl support to Qt 2016-02-11 12:54:06 +00:00
header.BSD Add new license header templates and license files 2016-01-14 20:43:46 +00:00
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header.COMM Add header template for commercial only modules 2015-10-19 10:37:18 +00:00
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header.LGPL3 Update copyright headers 2015-02-11 06:49:51 +00:00
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header.LGPL-ONLY Update copyright headers 2015-02-11 06:49:51 +00:00
INSTALL Doc: Update links in INSTALL file 2015-02-16 09:06:41 +00:00
LGPL_EXCEPTION.txt Update copyright headers 2015-02-11 06:49:51 +00:00
LICENSE.FDL Initial import from the monolithic Qt. 2011-04-27 12:05:43 +02:00
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LICENSE.GPLv3 fix up license references 2015-08-13 11:13:09 +00:00
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LICENSE.LGPLv3 Bump copyright year to 2016 2016-01-29 13:30:04 +00:00
LICENSE.LGPLv21 Bump copyright year to 2016 2016-01-29 13:30:04 +00:00
LICENSE.PREVIEW.COMMERCIAL Add new license header templates and license files 2016-01-14 20:43:46 +00:00
qtbase.pro mkspec: Correctly cleanup qhost.pri file. 2016-03-22 09:45:10 +00:00
sync.profile make a proper header-only module for QtZlib 2015-11-17 20:22:17 +00:00