More on Performance

René Micout rene.micout at
Thu Feb 4 05:28:13 CST 2010

I use a lot of loop-type "send X in 0 millisec" in my application "Exagofon" and I actually noticed that the process (music) was significantly faster when a window (Finder [Mac !] for example) hiding the application window, thus avoiding the screen refresh. However, I am not yet entered the phase of optimization of my code, so I am very interested in suggestions related to this post...
Sorry for this no-response
Bons souvenirs de Paris

Le 4 févr. 2010 à 11:06, Scott Rossi a écrit :

> I'm wondering if anyone has suggestions for maximizing the responsiveness of
> controls during a tight "send in..." loop.
> I just discovered an odd (but perhaps expected?) relationship between the
> send command and locking the screen.  It seems that placing "send in..."
> within a handler that locks and unlocks the screen significantly increases
> screen refresh performance compared to executing the send AFTER unlocking
> the screen.  I suppose this might be due to Rev being able to cue the next
> send before updating the screen but I would have expected send to operate
> independently of the screen update.
> At first I was thrilled to uncover this, as I've spent the last day trying
> to enhance the performance of a heavily animated stack, but I was quickly
> disappointed to find that controls on the card become extremely sluggish and
> less responsive when the send occurs before the screen unlock.  For example,
> a custom slider bogs down heavily and doesn't respond properly, compared to
> when the send occurs AFTER the screen unlock.
> I tried creating a temporary condition (controlActive) that is established
> when a control is clicked, which the send handler could check and then
> adjust the timing of the unlock screen appropriately.  But so far I'm not
> seeing any change in the (poor) behavior.  I will continue testing.
> Has anybody else run into this?  What strategies do you employ to get the
> best responsiveness out of your apps during tight repeat loops?
> Thanks & Regards,
> Scott Rossi
> Creative Director
> Tactile Media, UX Design
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