Thanks for getting interested about this.
I am not seeing any difference with this one:
Rectangle {
width: 360
height: 640
Rectangle {
anchors.fill: parent
property int i: 0
MouseArea {
anchors.fill: parent
onPressed : {
parent.i = mouse.x
}
onPositionChanged:{
parent.i = mouse.x
}
}
}
}
- Mikko
________________________________
From: Kennedy Aaron (Nokia-MS-Qt/Brisbane)
Sent: 29.12.2010 11:17
To: Kiilholma Mikko (Nokia-MS/Tampere)
Cc: Kiilholma Mikko (Nokia-MS/Tampere); [email protected]
Subject: Re: [Qt-qml] Some memory allocated for every mouse click.
Hi,
As strange as this may sound, can you try inserting another root Rectangle (so
that the MouseArea's parent is not the root element) and see if you get the
same results?
Cheers,
Aaron
On 29/12/2010, at 6:38 PM, "ext
[email protected]<mailto:[email protected]>"
<[email protected]<mailto:[email protected]>> wrote:
It seems that this is how JavaScript and garbage collection works. With this
example the memory usage just seems to be quite excessive.
________________________________
From:
[email protected]<mailto:[email protected]>
[mailto:[email protected]<mailto:[email protected]>]
On Behalf Of ext <mailto:[email protected]>
[email protected]<mailto:[email protected]>
Sent: 28.12.2010 03:28
To: <mailto:[email protected]> [email protected]<mailto:[email protected]>
Subject: [Qt-qml] Some memory allocated for every mouse click.
Hi,
I would like to know what's the reasoning behind this: The following code
causes allocation of 160 bytes every time the window is clicked (the GlowCode
call stacks of the allocations below).
I first thought that this is a leak but soon realized that the first
allocations are getting deleted later when the window has been clicked for
hundreds of times.
Dragging around the empty window causes allocations and deallocations to occur
in very high rate.
(My environment is Windows XP, Visual Studio, GlowCode, Qt4.7.1.)
Is this effective memory handling?
import Qt 4.7
import QtQuick 1.0
Rectangle {
width: 360
height: 640
property int i: 0
MouseArea {
anchors.fill: parent
onPressed : {
parent.i = mouse.x
}
onPositionChanged:{
parent.i = mouse.x
}
}
}
StackTrace Content
MSVCR90D!malloc_base+254 bytes 0x4D103E
MSVCR90D!malloc_dbg+774 bytes 0x4DFD76
MSVCR90D!malloc_dbg+191 bytes 0x4DFB2F
MSVCR90D!malloc_dbg+108 bytes 0x4DFADC
MSVCR90D!malloc+27 bytes 0x4EB25B
MSVCR90D!operator new+17 bytes 0x4CD691
QtScriptd4!QScriptDeclarativeClass::newObject file
C:\Qt\4.7.1\src\script\bridge\qscriptdeclarativeclass.cpp line 202+7 bytes
0x101E4D81
QtDeclaratived4!QDeclarativeObjectScriptClass::newQObject file
c:\qt\4.7.1\src\declarative\qml\qdeclarativeobjectscriptclass.cpp line 120+109
bytes 0x66199FD2
QtDeclaratived4!QDeclarativeObjectScriptClass::property file
c:\qt\4.7.1\src\declarative\qml\qdeclarativeobjectscriptclass.cpp line 258+35
bytes 0x6619AA67
QtDeclaratived4!QDeclarativeContextScriptClass::property file
c:\qt\4.7.1\src\declarative\qml\qdeclarativecontextscriptclass.cpp line 273+29
bytes 0x660A1D14
QtScriptd4!QTJSC::JSObject::getPropertySlot file
C:\Qt\4.7.1\src\3rdparty\javascriptcore\javascriptcore\runtime\jsobject.h line
391+20 bytes 0x100413AC
QtScriptd4!cti_op_resolve_skip file
C:\Qt\4.7.1\src\3rdparty\javascriptcore\javascriptcore\jit\jitstubs.cpp line
2298+20 bytes 0x100C2CE8
QtScriptd4!QTWTF::RefPtr<QTJSC::UStringImpl>::operator= file
C:\Qt\4.7.1\src\3rdparty\javascriptcore\javascriptcore\wtf\refptr.h line 117+0
bytes 0x100375B0
QtScriptd4!QTJSC::Register::operator= file
C:\Qt\4.7.1\src\3rdparty\javascriptcore\javascriptcore\interpreter\register.h
line 118+15 bytes 0x10092C26
QtScriptd4!QTJSC::ExecState::setCalleeArguments file
C:\Qt\4.7.1\src\3rdparty\javascriptcore\javascriptcore\interpreter\callframe.h
line 113+22 bytes 0x10094436
QtScriptd4!QTJSC::JITCode::execute file
C:\Qt\4.7.1\src\3rdparty\javascriptcore\javascriptcore\jit\jitcode.h line 79+36
bytes 0x100945BB
QtScriptd4!QTJSC::Interpreter::execute file
C:\Qt\4.7.1\src\3rdparty\javascriptcore\javascriptcore\interpreter\interpreter.cpp
line 716+49 bytes 0x1008630D
QtScriptd4!QTJSC::JSFunction::call file
C:\Qt\4.7.1\src\3rdparty\javascriptcore\javascriptcore\runtime\jsfunction.cpp
line 122+78 bytes 0x1010BF05
QtScriptd4!QTJSC::call file
C:\Qt\4.7.1\src\3rdparty\javascriptcore\javascriptcore\runtime\calldata.cpp
line 62+43 bytes 0x100E5E36
QtScriptd4!QScriptValue::call file
C:\Qt\4.7.1\src\script\api\qscriptvalue.cpp line 1605+59 bytes 0x101C3739
QtDeclaratived4!QDeclarativeQtScriptExpression::eval file
c:\qt\4.7.1\src\declarative\qml\qdeclarativeexpression.cpp line 479+67 bytes
0x660DE901
QtDeclaratived4!QDeclarativeQtScriptExpression::scriptValue file
c:\qt\4.7.1\src\declarative\qml\qdeclarativeexpression.cpp line 434+20 bytes
0x660DE6E4
QtDeclaratived4!QDeclarativeExpressionPrivate::scriptValue file
c:\qt\4.7.1\src\declarative\qml\qdeclarativeexpression.cpp line 614+23 bytes
0x660DF149
QtDeclaratived4!QDeclarativeExpressionPrivate::value file
c:\qt\4.7.1\src\declarative\qml\qdeclarativeexpression.cpp line 628+31 bytes
0x660DF227
QtDeclaratived4!QDeclarativeBoundSignal::qt_metacall file
c:\qt\4.7.1\src\declarative\qml\qdeclarativeboundsignal.cpp line 177+35 bytes
0x6604CCAF
QtCored4!QMetaObject::activate file
c:\qt\4.7.1\src\corelib\kernel\qobject.cpp line 3465+39 bytes 0x671518CC
QtDeclaratived4!QDeclarativeMouseArea::pressed file
c:\qt\4.7.1\src\declarative\tmp\moc\debug_shared\moc_qdeclarativemousearea_p.cpp
line 429+21 bytes 0x662B135B
QtDeclaratived4!QDeclarativeMouseArea::setPressed file
c:\qt\4.7.1\src\declarative\graphicsitems\qdeclarativemousearea.cpp line 845+0
bytes 0x661985F9
QtDeclaratived4!QDeclarativeMouseArea::mousePressEvent file
c:\qt\4.7.1\src\declarative\graphicsitems\qdeclarativemousearea.cpp line 462+13
bytes 0x66196D5E
gc6prof!0xb22151 0xB22151
gc6prof!0xb21f1d 0xB21F1D
gc6prof!MessageOut::OutputLastError+45268 bytes 0xB3C5C4
StackTrace Content
MSVCR90D!malloc_base+254 bytes 0x4D103E
MSVCR90D!malloc_dbg+774 bytes 0x4DFD76
MSVCR90D!malloc_dbg+191 bytes 0x4DFB2F
MSVCR90D!malloc_dbg+108 bytes 0x4DFADC
MSVCR90D!malloc+27 bytes 0x4EB25B
MSVCR90D!operator new+17 bytes 0x4CD691
QtDeclaratived4!QDeclarativeObjectScriptClass::newQObject file
c:\qt\4.7.1\src\declarative\qml\qdeclarativeobjectscriptclass.cpp line 120+33
bytes 0x66199F86
QtDeclaratived4!QDeclarativeObjectScriptClass::property file
c:\qt\4.7.1\src\declarative\qml\qdeclarativeobjectscriptclass.cpp line 258+35
bytes 0x6619AA67
QtDeclaratived4!QDeclarativeContextScriptClass::property file
c:\qt\4.7.1\src\declarative\qml\qdeclarativecontextscriptclass.cpp line 273+29
bytes 0x660A1D14
QtScriptd4!QTJSC::JSObject::getPropertySlot file
C:\Qt\4.7.1\src\3rdparty\javascriptcore\javascriptcore\runtime\jsobject.h line
391+20 bytes 0x100413AC
QtScriptd4!cti_op_resolve_skip file
C:\Qt\4.7.1\src\3rdparty\javascriptcore\javascriptcore\jit\jitstubs.cpp line
2298+20 bytes 0x100C2CE8
QtScriptd4!QTWTF::RefPtr<QTJSC::UStringImpl>::operator= file
C:\Qt\4.7.1\src\3rdparty\javascriptcore\javascriptcore\wtf\refptr.h line 117+0
bytes 0x100375B0
QtScriptd4!QTJSC::Register::operator= file
C:\Qt\4.7.1\src\3rdparty\javascriptcore\javascriptcore\interpreter\register.h
line 118+15 bytes 0x10092C26
QtScriptd4!QTJSC::ExecState::setCalleeArguments file
C:\Qt\4.7.1\src\3rdparty\javascriptcore\javascriptcore\interpreter\callframe.h
line 113+22 bytes 0x10094436
QtScriptd4!QTJSC::JITCode::execute file
C:\Qt\4.7.1\src\3rdparty\javascriptcore\javascriptcore\jit\jitcode.h line 79+36
bytes 0x100945BB
QtScriptd4!QTJSC::Interpreter::execute file
C:\Qt\4.7.1\src\3rdparty\javascriptcore\javascriptcore\interpreter\interpreter.cpp
line 716+49 bytes 0x1008630D
QtScriptd4!QTJSC::JSFunction::call file
C:\Qt\4.7.1\src\3rdparty\javascriptcore\javascriptcore\runtime\jsfunction.cpp
line 122+78 bytes 0x1010BF05
QtScriptd4!QTJSC::call file
C:\Qt\4.7.1\src\3rdparty\javascriptcore\javascriptcore\runtime\calldata.cpp
line 62+43 bytes 0x100E5E36
QtScriptd4!QScriptValue::call file
C:\Qt\4.7.1\src\script\api\qscriptvalue.cpp line 1605+59 bytes 0x101C3739
QtDeclaratived4!QDeclarativeQtScriptExpression::eval file
c:\qt\4.7.1\src\declarative\qml\qdeclarativeexpression.cpp line 479+67 bytes
0x660DE901
QtDeclaratived4!QDeclarativeQtScriptExpression::scriptValue file
c:\qt\4.7.1\src\declarative\qml\qdeclarativeexpression.cpp line 434+20 bytes
0x660DE6E4
QtDeclaratived4!QDeclarativeExpressionPrivate::scriptValue file
c:\qt\4.7.1\src\declarative\qml\qdeclarativeexpression.cpp line 614+23 bytes
0x660DF149
QtDeclaratived4!QDeclarativeExpressionPrivate::value file
c:\qt\4.7.1\src\declarative\qml\qdeclarativeexpression.cpp line 628+31 bytes
0x660DF227
QtDeclaratived4!QDeclarativeBoundSignal::qt_metacall file
c:\qt\4.7.1\src\declarative\qml\qdeclarativeboundsignal.cpp line 177+35 bytes
0x6604CCAF
QtCored4!QMetaObject::activate file
c:\qt\4.7.1\src\corelib\kernel\qobject.cpp line 3465+39 bytes 0x671518CC
QtDeclaratived4!QDeclarativeMouseArea::pressed file
c:\qt\4.7.1\src\declarative\tmp\moc\debug_shared\moc_qdeclarativemousearea_p.cpp
line 429+21 bytes 0x662B135B
QtDeclaratived4!QDeclarativeMouseArea::setPressed file
c:\qt\4.7.1\src\declarative\graphicsitems\qdeclarativemousearea.cpp line 845+0
bytes 0x661985F9
QtDeclaratived4!QDeclarativeMouseArea::mousePressEvent file
c:\qt\4.7.1\src\declarative\graphicsitems\qdeclarativemousearea.cpp line 462+13
bytes 0x66196D5E
gc6prof!0xb22151 0xB22151
gc6prof!0xb21f1d 0xB21F1D
gc6prof!MessageOut::OutputLastError+45268 bytes 0xB3C5C4
gc6prof!MessageOut::OutputLastError+45311 bytes 0xB3C5EF
StackTrace Content
MSVCR90D!malloc_base+254 bytes 0x4D103E
MSVCR90D!malloc_dbg+774 bytes 0x4DFD76
MSVCR90D!malloc_dbg+191 bytes 0x4DFB2F
MSVCR90D!malloc_dbg+108 bytes 0x4DFADC
MSVCR90D!malloc+27 bytes 0x4EB25B
MSVCR90D!operator new+17 bytes 0x4CD691
QtScriptd4!QScriptObject::setDelegate file
C:\Qt\4.7.1\src\script\bridge\qscriptobject_p.h line 168+7 bytes 0x101AFB38
QtScriptd4!QScriptDeclarativeClass::newObject file
C:\Qt\4.7.1\src\script\bridge\qscriptdeclarativeclass.cpp line 203+0 bytes
0x101E4DC3
QtDeclaratived4!QDeclarativeObjectScriptClass::newQObject file
c:\qt\4.7.1\src\declarative\qml\qdeclarativeobjectscriptclass.cpp line 120+109
bytes 0x66199FD2
QtDeclaratived4!QDeclarativeObjectScriptClass::property file
c:\qt\4.7.1\src\declarative\qml\qdeclarativeobjectscriptclass.cpp line 258+35
bytes 0x6619AA67
QtDeclaratived4!QDeclarativeContextScriptClass::property file
c:\qt\4.7.1\src\declarative\qml\qdeclarativecontextscriptclass.cpp line 273+29
bytes 0x660A1D14
QtScriptd4!QTJSC::JSObject::getPropertySlot file
C:\Qt\4.7.1\src\3rdparty\javascriptcore\javascriptcore\runtime\jsobject.h line
391+20 bytes 0x100413AC
QtScriptd4!cti_op_resolve_skip file
C:\Qt\4.7.1\src\3rdparty\javascriptcore\javascriptcore\jit\jitstubs.cpp line
2298+20 bytes 0x100C2CE8
QtScriptd4!QTWTF::RefPtr<QTJSC::UStringImpl>::operator= file
C:\Qt\4.7.1\src\3rdparty\javascriptcore\javascriptcore\wtf\refptr.h line 117+0
bytes 0x100375B0
QtScriptd4!QTJSC::Register::operator= file
C:\Qt\4.7.1\src\3rdparty\javascriptcore\javascriptcore\interpreter\register.h
line 118+15 bytes 0x10092C26
QtScriptd4!QTJSC::ExecState::setCalleeArguments file
C:\Qt\4.7.1\src\3rdparty\javascriptcore\javascriptcore\interpreter\callframe.h
line 113+22 bytes 0x10094436
QtScriptd4!QTJSC::JITCode::execute file
C:\Qt\4.7.1\src\3rdparty\javascriptcore\javascriptcore\jit\jitcode.h line 79+36
bytes 0x100945BB
QtScriptd4!QTJSC::Interpreter::execute file
C:\Qt\4.7.1\src\3rdparty\javascriptcore\javascriptcore\interpreter\interpreter.cpp
line 716+49 bytes 0x1008630D
QtScriptd4!QTJSC::JSFunction::call file
C:\Qt\4.7.1\src\3rdparty\javascriptcore\javascriptcore\runtime\jsfunction.cpp
line 122+78 bytes 0x1010BF05
QtScriptd4!QTJSC::call file
C:\Qt\4.7.1\src\3rdparty\javascriptcore\javascriptcore\runtime\calldata.cpp
line 62+43 bytes 0x100E5E36
QtScriptd4!QScriptValue::call file
C:\Qt\4.7.1\src\script\api\qscriptvalue.cpp line 1605+59 bytes 0x101C3739
QtDeclaratived4!QDeclarativeQtScriptExpression::eval file
c:\qt\4.7.1\src\declarative\qml\qdeclarativeexpression.cpp line 479+67 bytes
0x660DE901
QtDeclaratived4!QDeclarativeQtScriptExpression::scriptValue file
c:\qt\4.7.1\src\declarative\qml\qdeclarativeexpression.cpp line 434+20 bytes
0x660DE6E4
QtDeclaratived4!QDeclarativeExpressionPrivate::scriptValue file
c:\qt\4.7.1\src\declarative\qml\qdeclarativeexpression.cpp line 614+23 bytes
0x660DF149
QtDeclaratived4!QDeclarativeExpressionPrivate::value file
c:\qt\4.7.1\src\declarative\qml\qdeclarativeexpression.cpp line 628+31 bytes
0x660DF227
QtDeclaratived4!QDeclarativeBoundSignal::qt_metacall file
c:\qt\4.7.1\src\declarative\qml\qdeclarativeboundsignal.cpp line 177+35 bytes
0x6604CCAF
QtCored4!QMetaObject::activate file
c:\qt\4.7.1\src\corelib\kernel\qobject.cpp line 3465+39 bytes 0x671518CC
QtDeclaratived4!QDeclarativeMouseArea::pressed file
c:\qt\4.7.1\src\declarative\tmp\moc\debug_shared\moc_qdeclarativemousearea_p.cpp
line 429+21 bytes 0x662B135B
QtDeclaratived4!QDeclarativeMouseArea::setPressed file
c:\qt\4.7.1\src\declarative\graphicsitems\qdeclarativemousearea.cpp line 845+0
bytes 0x661985F9
QtDeclaratived4!QDeclarativeMouseArea::mousePressEvent file
c:\qt\4.7.1\src\declarative\graphicsitems\qdeclarativemousearea.cpp line 462+13
bytes 0x66196D5E
gc6prof!0xb22151 0xB22151
gc6prof!0xb21f1d 0xB21F1D
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