[webkit-qt] High memory consumption and memory growth in Qt5's WebKit compared to Qt4.8

Rethmeier, Eike eike.rethmeier at wincor-nixdorf.com
Thu Apr 11 00:13:37 PDT 2013


in January I have written a bug report on Bugzilla (https://bugs.webkit.org/show_bug.cgi?id=106304). It compares the memory consumption of a QtWebKit 'browser' compiled with Qt5 or with Qt4.8.4 (Windows XP and 7). It shows that the memory consumption is at least(!) 3 times higher for Qt5. We are using WK1 - the program is exactly the same for 4.8.4 and 5.0

I have attached a test program as well as a detailed description and detailed measurements when I submitted that report. However, no one seems to be interested in it, although I discussed this problem on this mailing list beforehand. Okay, maybe there are more pressing issues for everybody, but for me this is a reason to discourage from the use of Qt5's WebKit.

To prevent at least one of your requests: no, I have not yet tested QtWebKit 2.3.0 with Qt4.8.4, because this is time consuming and we would like to go the way with Qt5. Trying QtWebKit 2.3.0 would be the last solution to try.

Now my questions:
Did somebody take a look at the problem and/or the test program?
Has nobody else similar experiences?
Has somebody a promising idea how to solve that problem?


Eike Rethmeier
Software Developer
Banking Division Software Development
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