13.12.2016, 19:35, "Bono Damodi" <probablynotthebest...@gmail.com>:
> Hello,
> is there a way to deinitialise QtWebkit in runtime completely? For example
> for this code:
>
> #include <QApplication>
> #include <QGraphicsWebView>
> #include <QUrl>
> #include <QTimer>
>
> QGraphicsWebView* graphicsWebView;
>
> class Deleter : public QObject
> {
> Q_OBJECT
> public slots:
> void deleteWebView()
> {
> delete graphicsWebView;
> }
> };
>
> int main(int argc, char *argv[])
> {
> QApplication app(argc, argv);
> graphicsWebView = new QGraphicsWebView;
> graphicsWebView->setUrl(QUrl("http://www.google.com";));
> Deleter d;
> QTimer::singleShot(10000, &d, SLOT(deleteWebView()));
> return app.exec();
> }
>
> #include "main.moc"
>
> After deleting graphicsWebView object there is still used about 2mb of
> physical memory (more than 6 mb of virtual memory) by Webkit's OSAllocator (I
> tracked mmap's calls by OSAllocator and then correlated with
> /proc/pid/smaps). Much of the memory seems to be requested by
> JSC::JIT::compile function.
>
> Is there some way to completely clean QtWebkit after it was initialised?
To clear code compiled by JIT it should be enough to
QWebSettings::clearMemoryCaches()
However, note that it's not ever possible to clear 100% of memory allocated by
WebKit (any port), because a lot of data structures are by design
NeverDestroyed (look for DEFINE_STATIC_LOCAL in your QtWebKit version).
>
> This is Qt 4.8
Please consider upgrading to Qt 5. Qt 4.8 have reached EOL, and all compatible
QtWebKit versions are horribly out of date.
>
> Best regards
> ,
>
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> webkit-help mailing list
> webkit-help@lists.webkit.org
> https://lists.webkit.org/mailman/listinfo/webkit-help
--
Regards,
Konstantin
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