Also, check the implementors of stepTime.
e.g. in Balloon:
BalloonMorph>>stepTime
^ 0 "every cycle"
Ouch.
Athens may have something similar.
Philippe Back
2012/9/5 S Krish <[email protected]>:
>
> I understand the impact of rendering every millisecond..
>
>
> TestAnimationClock
> #drawOn: aCanvas
>
> I have to dig in a bit more.. is the issue here.. not NB/ VGTigerDemo.
>
> Normally all of Morphic rendering is I presume , premised on the invocation
> of this method recursively on all submorphs till all of them are rendered..
> for all morphs on screen.
>
> TestAnimationClockPanel: Also I have a similar override.. and it does not
> give me any overhead.. though all it has is one Text.. string.
>
> Why should only Clock have such an overhead.. : is because of calculating
> the hour/minute/hand vector .. ?
>
> Will dig in more and try to understand this for optimizations.
>
>
> **********
> PS: I am not using the startStepping / stop.. mechanism as yet in these..
>
> Maybe I am naive.. about presuming..
>
> On Wed, Sep 5, 2012 at 3:36 AM, Igor Stasenko <[email protected]> wrote:
>>
>> On 4 September 2012 16:18, S Krish <[email protected]>
>> wrote:
>> > As an screenshot should explain it better..
>> >
>> > This is now pushing the CPU to 66 - 90%+ almost all the time.. and as
>> > the
>> > top hogger of CPU constantly..
>> >
>> hmm, what did you expected there? Cairo uses CPU for rendering. It is
>> faster than balloon, must faster
>> but sure thing if you run animation which renders new frame as soon as
>> it finished previous one,
>> it will consume full available CPU resources.
>>
>>
>> > Not having VGTigerDemo does not alter it much.. so its not NativeBoost
>> > at
>> > fault per se..
>> >
>> > Kill the clock and the VGTiger it comes down to a nice 4% CPU
>> >
>>
>>
>>
>>
>> > On Tue, Sep 4, 2012 at 7:08 PM, S Krish
>> > <[email protected]>
>> > wrote:
>> >>
>> >>
>> >>
>> >> If we override #drawOn: and implement custom logic to draw.. every few
>> >> milliseconds as it gets called the CPU usage shoots to available max..
>> >>
>> >> Run four instances of the same class that overrides and does some
>> >> moderately complex draw routine of say : CircleMorph with border set,
>> >> few
>> >> lines, color rendering..
>> >>
>> >> I will send in the .st file later .. that can be tested against..
>> >>
>> >>
>> >> Is this expected or what are the ways to avoid this CPU overhead...
>> >>
>> >>
>> >> NativeBoost animation, far more responsive.. also goes up very
>> >> similarly.
>> >> but little more tolerable... VGTigerMorph... more so than FlakesDemo...
>> >>
>> >>
>> >>
>> >
>>
>>
>>
>> --
>> Best regards,
>> Igor Stasenko.
>>
>
