Performance decrease in win 7 64 from 32

[jt4474]

I recently upgraded from win 7 pro 32 to 64 bit.

One of things I noticed is that fastpictureviewer is no longer as fast. Not massively slow, but certainly no longer fast. It was blazing fast in win 7 32.

I have a core i7 with bags of ram. I have fiddled with the graphics / preload etc settings, but it's still sluggish. Picasa works fine, and is ultraresponsive. When I scroll with the mouse wheel picasa keeps up, but fastpictureviewer is slightly behind the pace, and takes say half a second to do things which it should do much quicker. It's also pushing an unusally high cpu load, though I'd have to go back to my 32 bit install to double check by how much.

I have imaged my 32 bit installation so am happy to go back to that to compare the speeds, but basically fastpictureviewer is not performing well for me in win 7 64. Has anyone else experienced this? Any tips?
Thanks

[Axel]

Interesting... Are you running the 64-bit version of the program on your new 64-bit operating system?

[jt4474]

I tried both versions, and neither was as snappy as on 32

[mRp]

hi axel
i noticed this to, but i have not used the application much since september when i first bought your program
but back then it was noticeable slower in x64 vs x86, especially when scrolling threw my images

Q9550\quad\8gb-ram

as OP i have also my install´s of win7 imaged so i can provide some testing quickly if needed

cheers..

[jt4474]

If you have a diagnostic utility / app that logs processing times etc I'd be very happy to try it out for you, otherwise I'm unable to continue using fastpictureviewer on my system because it's not working as fast as it should, which is a shame as it was amazing on win7 32.

I will test out some alternatives to see how they do

[jt4474]

XNview and irfanview are both equally sluggish.

I tried fastpictureviewer with my superfast SSD drive and there was no increase in speed compared to my regular sata 7200rpm hard drive. This supports my suspicion that this is an x64 issue and not due to my hard disk.

[Axel]

If imaging apps, including FPV, are slowed down to the point of becoming unuseable, I suggest that you look for reasons on the computer itself. I don't have much suggestions to offer, but in our experience FPV is much quicker on x64 than it was on x86 systems, mostly because it can use a lot more memory for image preloading and caching. See this video made on a modest (but modern) 64-bit machine: http://vimeo.com/6209887

[jt4474]

Wow that video is making me jealous!

[Axel]

Win7 is still shiny-new, perhaps we need to give some time for driver writers etc to get up to speed. After all, XP video drivers are still tuned today, after so many years, sometimes with significant performance gains in specific cases. If you have a WDDM 1.1 driver - new for Windows 7 - chances are that it will be tuned and will become a lot quicker in the coming months, the goal for the initial release certainly being stability over performance. There is nothing in FPV that would slow down in 64-bit mode, and the much greater available memory should make things faster and smoother.

If you don't use the GPU-accelerated mode, we made a change in a recent version that is actually slowing down the program a little in exchange for better image quality: the filtering algorithm used is now better if you check the "High quality downscaling" option, and the previous "high quality" - which was bi-linear filtering - is the new "low quality" (when the option is unchecked). You may want to uncheck this option to get to the old quality/speed compromise.

This option has no effect on speed when the GPU mode it turned on, and its effectiveness is entirely governed by the graphic card's abilities, in particular the card must support multisampling to get smooth pixels in fit-to-window mode.

TIP: Be sure to exclude the image folders from being scanned by your AV. You can also put FastPictureViewer.exe on the exclusion list of your AV scanner, in order to prevent the anti-virus to scan all images opened by the program. Kasperky 2010 users also have to option to exclude digitally signed programs (that would include FastPictureViewer and all the codecs it uses) : http://support.kaspersky.com/faq/?qid=208280683

[jt4474]

My card is a nvidia geforce 9800GT

The latest driver model says wddm 1.1

I'll see what happens if I go back to the windows standard graphics driver which seemed to work with my card after a fresh install