With webkit nightly building(Qtwebkit weekly builds),QtWebkit library's size becomes bigger and bigger，for many of us who use qtwebkit library to code apps,some features of webkit are unnecessary ,such as Html5 support ,JavaScript debugger,WML support,especially SVG.So just remove these feature from webkit and then we can save some rooms when we release our apps.Unlike the entire highly modular of Gecko,Webkit is lightweight renderer that clean code base.That is why google picked webkit rather than gecko as their browser engine.It make our things easy。

Qt version :4.6.0

-platform: win32-msvc2008

Qtwebkit.dll

The initial size of the: 9673k

Ater cutting down:5963k

Step 1. Edit QTDIR\src\3rdparty\webkit\WebCore\WebCore.pro,add following lines

DEFINES += ENABLE_RUBY=0:disenable HTML5 ruby support

DEFINES += ENABLE_VIDEO=0:disenable HTML5 media support

DEFINES += ENABLE_NETSCAPE_PLUGIN_API=0:disenable Nescape plugins support

DEFINES += ENABLE_VIDEO=0:disenable Web Socket support.

DEFINES += ENABLE_XSLT=0:disenable XSLT support with QtXmlPatterns

DEFINES += ENABLE_CHANNEL_MESSAGING=0 :disenable HTML5 channel messaging support

DEFINES += ENABLE_JAVASCRIPT_DEBUGGER=0 :disenable JavaScript debugger/profiler support

DEFINES += ENABLE_SQLITE=0:disenable sqlite support

DEFINES += ENABLE_DATABASE=0 :disenable HTML5 client-side database storage support

DEFINES += ENABLE_EVENTSOURCE=0 :disenable HTML5 server-sent events support

DEFINES += ENABLE_OFFLINE_WEB_APPLICATIONS=0:disenable HTML5 offline web applications support

DEFINES += ENABLE_DOM_STORAGE=0:disenable HTML5 client-side session and persistent storage support

DEFINES += ENABLE_ICONDATABASE=0:disenable Icon database support

DEFINES += ENABLE_SHARED_WORKERS=0:disenable SharedWorkers support

DEFINES += ENABLE_WORKERS=0 :disenable workder support

DEFINES += ENABLE_WML=0:disenable wml

DEFINES += ENABLE_XPATH=0:disenable xpath

DEFINES += ENABLE_XBL=0:disenable xbl

DEFINES += ENABLE_ORIENTATION_EVENTS=0 :

DEFINES += ENABLE_DASHBOARD_SUPPORT=0 :

DEFINES += ENABLE_FILTERS=0 :

DEFINES += ENABLE_WCSS=0 :

DEFINES += ENABLE_XHTMLMP=0 :

DEFINES += ENABLE_DATAGRID=0 :

DEFINES += ENABLE_SINGLE_THREADED=1 :

Step 2.when we release our apps,the WebInpector is unuseful for most of people,although it's very convenient for developer.Firstly Remove the following line from WebCore.pro which contains many images for WebInspector compiling.

RESOURCES += $PWD/../WebCore/inspector/front-end/WebKit.qrc

then insert these into WebCore.pro

DEFINES += ENABLE_INSPECTOR=0

contains(DEFINES, ENABLE_INSPECTOR=) {

SOURCES -= \

inspector/ConsoleMessage.cpp \

inspector/InspectorBackend.cpp \

inspector/InspectorController.cpp \

inspector/InspectorDatabaseResource.cpp \

inspector/InspectorDOMAgent.cpp \

inspector/InspectorDOMStorageResource.cpp \

inspector/InspectorFrontend.cpp \

inspector/InspectorResource.cpp \

inspector/InspectorTimelineAgent.cpp \

inspector/TimelineRecordFactory.cpp \

}

Tips:follow steps above and nmake may still cause errors。you just find the .cpp and .h files displayed errors and insert the corresponding macro.It will be ok.

Remember to run QTDIR/demo/browser to test if new QtWebkit4.dll works succesfully.

Hope you can make it.