mouse click latency

Dan B. Phung phung at
Wed Apr 23 10:56:39 PDT 2008

Rene Rebe wrote:
> Hi,
> On 23.04.2008, at 16:24, Dan B. Phung wrote:
>> I'm timing the latency for an application (a screensaver in this case)
>> to handle a mouse click.  I take a timestamp in the mouse driver
>> (appletouch, usb) and another timestamp when the screensaver handles the
>> event.  For the appletouch driver I get a latency of ~83 ms, and the usb
>> mouse is ~57 ms, which seems like madness.  Keyboard clicks are ~5.7 ms
>> which are more on the order of what I expected for the mouse clicks.
>> What's the expected latency of mouse clicks?
>> config:
>> Macbook, running Ubuntu 7.10
>> Linux kernel
>> Xorg 7.2, Mesa 7.0,
>> xscreensaver-5.03
> Uneducated guess: double click detection?
> Yours,
wouldn't that be at the toolkit/application level though?  the 
screensaver simply detects the click event, and that's when I 
timestamp.  you wouldn't want the Xserver to delay mouse clicks for 
first-person-shooters, etc.

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