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authorSean Harmer <sean.harmer@kdab.com>2012-07-18 15:06:06 (GMT)
committerQt by Nokia <qt-info@nokia.com>2012-07-27 16:07:01 (GMT)
commit2f4093332db6c9057b82f9c5fababc9bc6cbeb32 (patch)
treece8a47a14d22f70796ec78dc7d90ed7742dd134c /src/3rdparty/libtiff/html/v3.4beta029.html
parentcc9020490ac5e0fba580f73ca8b9948a1b4b54bf (diff)
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Introduce ImprovedSearchHeuristics flag to QLibrary
This commit introduces a new flag to safely introduce the improved search behaviour in Qt5's QLibrary. If the flag is set then QLibrary will use the following search heuristic. Otherwise the existing behaviour will be used. New search behaviour: If an absolute path is specified we try that first. Otherwise we first try the most likely system-specific format (e.g. libfoo.so) on Unix. This improves performance especially on systems with slow flash devices. For example, prior to this commit loading the Xcursor library (in the xcb plugin) results in attempts to dlopen: "Xcursor" "Xcursor.so.1" "libXcursor" "libXcursor.so.1" With this commit this is reduced to a single attempt of: "libXcursor.so.1" Plugin loading uses absolute paths with QLibrary so there is no performance penalty for plugins with this commit. There will be a follow-up commit to make use of the new flag within Qt to improve performance. This is a backport of 0026b80cd2a484ad9d685ff5a4f89e6c9815f913 Change-Id: I0dbc83c2909713c01dc687ab8cc3cb0619d1500a Reviewed-by: Lars Knoll <lars.knoll@nokia.com>
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