Bug#578019: libwebkit-1.0-2: makes DNS query for every mouse movement

[ian_bruce at fastmail.net]

On Tue, 20 Apr 2010 10:12:16 -0300
Gustavo Noronha Silva <kov at debian.org> wrote:

> I can reproduce the problem with the HTML page you crafted. Seems
> worth reporting upstream (I will do it later today).

> For some reason WebKit thinks it should do the pre-resolution when the
> mouse is moved on top of the blank area of the page indeed.

It turns out that this bug was already reported OVER A YEAR AGO:

https://bugs.webkit.org/show_bug.cgi?id=23846#c3

A fix was proposed over six months ago:

https://bugs.webkit.org/show_bug.cgi?id=23846#c5

I don't understand why this fix hasn't been applied upstream. Even if
you don't think this behaviour is a security problem, it's a big waste
of CPU and network resources to issue a completely useless external DNS
query for every mouse movement event -- that is, for every few pixels
that the pointer moves. That is a ridiculously stupid thing to do.

Gustavo, I draw your attention particularly to the following comments:

https://bugs.webkit.org/show_bug.cgi?id=23846#c14

https://bugs.webkit.org/show_bug.cgi?id=23846#c19