#11654 NORM 1.75-so: Lag displaying SVG in Cairo

[Zarro Boogs per Child]

#11654: Lag displaying SVG in Cairo
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           Reporter:  manuq         |       Owner:               
               Type:  defect        |      Status:  new          
           Priority:  normal        |   Milestone:  1.75-software
          Component:  not assigned  |     Version:  not specified
         Resolution:                |    Keywords:               
        Next_action:  never set     |    Verified:  0            
Deployment_affected:                |   Blockedby:               
           Blocking:                |  
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Changes (by Quozl):

  * milestone:  1.75-hardware => 1.75-software


Old description:

> os28,
>
> I see a lag of ~2.7 seconds displaying a SVG with Cairo.  For the same
> image, 1.5 takes 0.01 seconds.
>
> A simple test case app is attached.
>
> Bug related: #11456 "The animal of TypingTurtle is not smooth"
>
> If I apply the attached patch to Clock activity, latest git, which
> ports the drawing operations to Cairo, I get a lag while displaying
> the "nice clock", which is an SVG graphic.
>
> In 1.5, the clock updates properly every 1 sec.  In 1.75, it updates
> every 5-7 secs, that is a huge lag.

New description:

 os28,

 I see a lag of ~2.7 seconds displaying a SVG with Cairo.  For the same
 image, 1.5 takes 0.01 seconds.

 A simple test case app is attached to #11655.

 Bug related: #11456 "The animal of TypingTurtle is not smooth"

 If I apply the attached patch to Clock activity, latest git, which
 ports the drawing operations to Cairo, I get a lag while displaying
 the "nice clock", which is an SVG graphic.

 In 1.5, the clock updates properly every 1 sec.  In 1.75, it updates
 every 5-7 secs, that is a huge lag.

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Ticket URL: <http://dev.laptop.org/ticket/11654#comment:2>
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