Dear Alexis
Thanks for your reply in such a quick.
Actually I have ever checked this problem in Qt 4.7.3、Qt 4.7.4 and Qt 4.8, and
it
remains the same in all these versions. After that I decided to come to this
place
to find some help.
Regards
Eric Chen
On 2012年03月01日 10:04, Alexis Menard wrote:
On Wed, Feb 29, 2012 at 10:57 PM, chen mihua<[email protected]> wrote:
Dear Alexis
Thanks for your reply.
It is correct that OS will free all allocated memory when the program is
closed, however, this will
not help us, because we want our program to run continuously after the
device is powered on.
The program has multi tab feature, so construction and destruction of
webview objects will happen
frequently in our scenario.
Ah that is something else. You were talking about the all program in
your original mail. Now yes deleting views should not leak I agree.
So it would be a problem if memory leak happens after every destruction of
webview object.
Don't you agree this?
Agree.
You have mentioned that it is faster to free leaking memory by OS , but in
my view a program is
responsible for doing cleanup work by itself and never depends OS to do it.
So I want to figure out the real reason why webkit is designed like this?
Can you provide some
information about this?
I need to investigate. Maybe it is fixed since the version of Qt 4.8
Could you try to compile a webkit trunk to see?
Best Regards
Eric Chen
On 2012年02月29日 19:17, Alexis Menard wrote:
On Wed, Feb 29, 2012 at 12:53 AM, 陳敏華<[email protected]> wrote:
Dear all
I'd like to ask you question about memory leak in Webkit. Currently, I am
using
QtWebkit self contained in Qt 4.8.0, and my test application is like
follows:
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
QWebView* view = new QWebView();
view->load(QUrl("http://www.baidu.com";));
view->show();
a.exec();
delete view;
return 0;
}
As you know, Webkit provide RefCountedLeakCounter class to detect memory
leak. When I run this test application in debug mode, I have noticed that
many WebCoreNodes and CachedResource have leaked. This leak could be a big
problem because we want to make use of WebKit in embedded device.
But when the program is closed aren't the memory allocated to him
freed by the OS?
So, I'd like to ask you all whether this memory leak real or not? I just
can't believe Webkit would leak memory in such a simple test, or if Webkit
provides some other mechanism to ensure memory will not be leaked, please
tell me.
It happens that sometimes leaking on exit is not very bad as the OS
will free the memory for you anyway. In some scenarios it is faster to
do so...Now I haven't investigate myself but I know it sometimes
happens. In modern OS it's not a problem, maybe on yours it is fine
too. You have to check.
Can anyone provide some information about this problem? I really
appreciate your help.
Best Regards
Eric Chen
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