[REBOL] Re: Graph Drawing & /View Performance
From: etienne:alaurent:free at: 9-May-2002 22:15
Hi, Richard,
I don't see any difference about exec speed between your 2 scripts.
But, it's very interesting to know it's better to use one 'show for
whole window than a 'show for every sub-face.
Cyphre wrote:
>Hi Romano and all,
>
>>From my experience:
>
>-use "show f" on each face when you need refresh small parts of window but
>don't use it when you need show lot of small faces
>-using one "show f" for whole window is better when you are controling more
>faces in the window at the same time...then you rather use 'redraw function
>in each small face instead of 'enagage
>
>you can see the performance difference in following examples:
>
>http://www.rebol.cz/~cyphre/draw-tutor-2orig.r - this script uses method of
>refreshing each object face separately
>
>http://www.rebol.cz/~cyphre/draw-tutor-2.r - this script uses method of one
>global 'show of the whole window area
>
>regards,
>
>Cyphre
>
>----- Original Message -----
>From: "Romano Paolo Tenca" <[rotenca--telvia--it]>
>To: <[rebol-list--rebol--com]>
>Sent: Wednesday, May 08, 2002 9:46 PM
>Subject: [REBOL] Re: Graph Drawing & /View Performance
>
>>Hi Christian,
>>
>>>(The lapse I made before was that I had an "show f" in the
>>>node-face!'s engage function - there none was due. I probably have to
>>>reread the chapter in "/View in 21 Days" on where to put stuff like
>>>this - oh well ;-)
>>>
>>I have tryed many show position/combination, also tryed hardware move
>>
>with
>
>>changes: 'offset, but
>>
>> show window
>>
>>in this case was the best solution (i do not know why). I do not think
>>
>there
>
>>is some good doc about show use, but if something is slow often the reason
>>
>is
>
>>a great number of (and often also duplicate) show calling.
>>
>>---
>>Ciao
>>Romano
>>
>>
>>
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>>
>
--
regards.
---
Etienne
