[Xcb] XPutImage and context switches / roundtrips?

[Julien Danjou]

At 1223946985 time_t, Jamey Sharp wrote:
> However, I don't think that the input queue size should change--Xlib
> only reads 32 bytes per system call (insert a bunch of handwaving here),
> so 4kB is already tons better than Xlib. The only reason to have a
> buffer that big is when you're absolutely flooded with incoming events.
> If anything we might want to tune it down some.

Here's a fixed one. Please review before I commit. :-)

Cheers,
-- 
Julien Danjou
// ᐰ <julien at danjou.info>   http://julien.danjou.info
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