Re: speed of qt terminal

[Daniel J S. <dan...@ie...>]

On 06/26/2015 08:36 PM, sfeam wrote:
> On Friday, 26 June 2015 07:22:41 PM Daniel J Sebald wrote:
>> On 06/26/2015 06:49 PM, Tatsuro MATSUOKA wrote:
>
>>> Daniel.
>>> Can you show me a short script at which qt terminal is rather slow?
>>>
>>> I would like to execute it on windows and ubuntu PC.
>>>
>>> Tatsuro
>>
>> Try something like:
>>
>>     cd '<buildpath>/gnuplot/demo'
>>     set term qt
>>     splot 'blutux.rgb' binary array=(128,128) flipy format='%uchar' using
>> 1:2:3 with rgbimage
>>
>>     [rotate the image using a mouse]
>>
>>     set term x11
>>     replot
>>
>>     [rotate the image using a mouse]
>
> On my linux machine the qt terminal is much faster than x11 in this test.
>
>    qt5 5.2.0
>    x11 xorg 1.14.5
>    Intel on-chip HD Graphics 4000
>
> It is possible that your qt configuration is not using the optimal
> rendering mode.  I'll look into trying to report this somewhere.
> Maybe "show term"?
>
> 	Ethan

I'm pretty sure my system isn't optimum--based upon what I know from 
compiling graphics drivers a few months back.  (It's a lot of work 
because there are a half dozen or more supporting libraries that need to 
be built until eventually the actual driver can be built.)  There's 
probably some software rendering along the way and it eventually comes 
back to X11.

Intel hardware, on the other hand, has a lot of rendering support, so it 
doesn't surprise me you're seeing the opposite performance-wise.  How 
about wxt?  Does that terminal perform as well as qt?

Dan