[squeak-dev] EventSensor wait2ms (Re: [ANN] Croquet OpenGL on
John M McIntosh
johnmci at smalltalkconsulting.com
Tue Mar 23 17:50:14 UTC 2010
When the *high priority* task looking at the mouse location in the Browser see the cursor move between the browser windows it would change the cursor. Then invoke a tight loop to see when the cursor reentered a browser pane. This would drive 100,000 peekPosition starving the regular morphic loop. The result was that at the time the cursor would *stick* between browser panes if your timing was *just* right.
It would appear that all that code was refactored in the last 5 years. Still if you feel that looking at the mouse position 100,000 a second is worthwhile?
you could rip it all out and hope there aren't side-effects. Like someone launch a process, then peek for mouse up. Wonder who will get the CPU? The task doing the work? Or the hyper processing spin 100,000 peeks a second waiting for the mouse to go up?
"Change Set: EventSensorDelayOnHyperPolling
Date: 7 November 2005
Author: johnmci at smalltalkconsulting.com
Attempt to ensure polling for event data does not drive cpu to 100%. Wait 2ms between looks at mouse position or for keyboard events. Usually these don't happen 100's of times per second anyways"!
On 2010-03-23, at 9:16 AM, Igor Stasenko wrote:
> On 23 March 2010 18:10, Andreas Raab <andreas.raab at gmx.de> wrote:
>> On 3/23/2010 4:46 AM, Bert Freudenberg wrote:
>>> Neat :) Works like a charm on my old MacBook Pro, about 400 fps.
>> Yeah, I was wondering why it's so much slower in trunk than in our internal
>> images or Croquet. First I thought it's the JIT but then I looked at a
>> profile and found EventSensor>>wait2ms called from several places in
>> EventSensor and indirectly via Sensor anyButtonPressed .
>> WTF? This isn't in any of the images I've ever used, does someone know why
>> we're doing this? Randomly waiting for 2ms and *no comment* as to what the
>> purpose of that wait might be? I'm in favor of ripping this out; there
>> should be absolutely no need to wait for 2ms in EventSensor.
> All senders of wait2ms seems having same author , and very small time frame:
> JMM 11/7/2005 14:39
> So, i suppose we could ask the author to comment this.
>> - Andreas
> Best regards,
> Igor Stasenko AKA sig.
John M. McIntosh <johnmci at smalltalkconsulting.com> Twitter: squeaker68882
Corporate Smalltalk Consulting Ltd. http://www.smalltalkconsulting.com
-------------- next part --------------
A non-text attachment was scrubbed...
Size: 2445 bytes
Desc: not available
Url : http://lists.squeakfoundation.org/pipermail/squeak-dev/attachments/20100323/de12400a/smime.bin
More information about the Squeak-dev