[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Openexr-devel] tips for maximizing write speed?
From: |
Piotr Stanczyk |
Subject: |
Re: [Openexr-devel] tips for maximizing write speed? |
Date: |
Wed, 31 Oct 2012 15:38:36 +0000 |
np. glad you got it sorted.
Piotr
________________________________________
From: address@hidden address@hidden on behalf of Paul Miller address@hidden
Sent: 31 October 2012 08:15
To: address@hidden
Subject: Re: [Openexr-devel] tips for maximizing write speed?
On 10/30/2012 4:29 PM, Paul Miller wrote:
> On 10/30/2012 3:57 PM, Piotr Stanczyk wrote:
>> Hey - I've not seen that before ... I'll see if I can replicate that
>> at our end.
>>
>> Are you writing scanlines or tiles?
>
> Scanlines. Seems to be in the ZIP compression. When I turn off
> compression it runs nearly as fast as 1.4. I haven't fiddled with the
> other compression options.
>
> I'm not sure if enabling threads will make a difference. I'm pretty much
> using the default constructors for everything.
>
> Thinking I may have built the library with the wrong optimization
> settings, I went back and kicked everything up a notch, but it's still
> quite a bit slower. Checked on both Linux and Windows.
>
> Thanks for checking, Piotr.
Ok I nailed it down. My new exporter is converting the alpha to 4
channels and saving all 4 channels. 4x slower, duh. Sorry for the false
alarm.
_______________________________________________
Openexr-devel mailing list
address@hidden
https://lists.nongnu.org/mailman/listinfo/openexr-devel