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Re: Scatter. Faster updates for huge datasets [message #26702 is a reply to message #26701]

Wed, 19 May 2010 21:55

koldo
Messages: 3464
Registered: August 2008

Senior Veteran

Quote:

Hello Koldo,

Nice Optimization you did!
But i think that will not works correct for all points data! It works only for x sorted points.
I did not look in detail your changes. But I will do!

Overall, nice realization!

Thank Ion

Yes it is. Both optimizations are centered on X data series. Remember the names. Both ends with "X":

- SetSequentialX: Requires a series of ordered data in X axis
- SetFastViewX: Minimizes pixel drawing considering X axis

Both optimizations could be implemented for vertical series. For real XY plots (like a circle) they are not useful.

However in many cases (from my experience) datasets are sequentially ordered following X axis. And the speed improvement is very high.

Best regards
Iñaki

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[Message index]

		Scatter. Faster updates for huge datasets By: koldo on Wed, 19 May 2010 15:50
		Re: Scatter. Faster updates for huge datasets By: tojocky on Wed, 19 May 2010 21:38
		Re: Scatter. Faster updates for huge datasets By: koldo on Wed, 19 May 2010 21:55
		Re: Scatter. Faster updates for huge datasets By: tojocky on Thu, 20 May 2010 09:10

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