[Lazarus] Fastest way to draw

[Brad Campbell]

Reimar Grabowski wrote:
> 
>> AggLCLCanvas was taking 30ms just to do a clear. Using a filled rectangle with the desired 
>> background colour took only 10ms by comparison.
> Did you report this bug?

Not yet, no. I need time to prepare some solid test cases.

>  
>> RGBBitmap32 : 19ms / frame
> 
>> but 
>> for just slapping lines down on a canvas LazRGBGraphics is hard to beat.
> I'd like to give it a try. 19ms does not sound that fast. Definitly missing the magical 60fps. How many lines did you draw for this tests? And did you only measure the time for drawing/rendering or the time for a whole frame update?

Uh, about 4000 lines, and the time was from "receive a packet of bytes" to after the 
"application.processmessages" that ensured the display was properly rendered.

The pre-processing of the array was usually less than 1ms, so the rendering is what takes the time. 
The drawing is pretty fast (usually ~1.5ms).

When I can only get 45fps from the Scope hardware, I'm really not fussed about not being able to 
draw 60.

What is magical about 60fps?

Regards,
Brad
-- 
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