1:1 Preview Performance

Although I render 1:1 previews and as soon as I do it moving from image to image is instantaneous, after I apply some metadata and some adjustments in the development module it takes a few seconds to render preview when I move from image to image.
I run LR 2.3 on a MacPro 2.66ghz (2007) with 16GB RAM. LR Catalog and Library are on internal fast 1TB drive less than half full.
I process 21MPx files form canon 1Ds MK III in RAW format and some are processed with Photoshop CS4 and saved within LR.
Is this level of performance normal or is something wrong with my machine/set up?
Thanks,
Francesco Tonelli

Hi John,
Thanks for your reply.
I used to render Standard preview on import to all my images.
Recently I decided to start 1:1 on import on all images, since I don't mind waiting after importing, if that would gain me speed when I work on the images.
To be honest I am not noticing an improvement after I start using the development module. I might start to go back to standard previews...
But I wish response would be quicker.
Would be nice if in future versions of LR they would put an option to write all XMPs automatically at the end of one session on quit. This way the system would be faster when you use it and still you would not forget to save the XMPs at the end.
Performance, performance...seems not to be ever enough!
Best,
Francesco

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function(){return A.apply(null,[this].concat($A(arguments)))}
JEShort01 wrote:
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My experience - Slow processing of previews is killing performance?

Set up:
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If I try the above actions after turning off previews the processing is down to 4 to 6 seconds for a photo.
Is anyone else seeing this massive slowdown with previews?
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I usually work with previews off and build them at the end of my workflow, but I'd like to know if I have a problem with my library / install.

Hi...I have the exact same machine as you except for the external drive. Also, I shoot RAW with a Nikon D300 (+/- 12 MB file). I'm far to be seeing the same performance as you. Processing is much faster, I would say about 2 sec for a photo. The only thing I would do if you haven't done it already is to set preview size to no larger than your screen resolution (for the 24'' iMac is "Fit within 1920 X 1920" )with a quality no higher than 6.

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