"Is the consensus that LR 4+ is slow?"

No.

johnbeardy wrote:

 

olvierpsmile@yahoo.com wrote:

 

Do you know if it would be reversible, i.e. if I find it does not work for me, would it let me go back to my previous version?

Sure. LR4 creates a copy of your LR3 catalogue.

 

John

However, stuff you subsequently do in your LR4 catalogue can't be converted back to LR3 catalogue format. 

PS - I agree that there is no consensus about LR4 being slow.  Some report severe reductions in speed, but I (and I believe the majority of users) find it similar to LR3 for most functions, slower for some (e.g. switching modules, especially the first time in a session). 

Concenus = no, but yes many of us have experienced poorer performance. Mine was terrible initially, but after finding info via these forums regarding negative caching and corrupt preference files, my performance, while slower on certain tasks, is otherwise now similar to 3.6.

I'd download it (all 800 MB !!!!) and give it a whirl ....... overall I find that the new process version is a nice improvement.

I don't think the version of Photosop should be a problem, as you basically create a new image to work on in PS e.g. JPEG, TIFF or PSD. Obviously the version of ACR with CS4 will be a problem, but I assume RAW processing will be entirely done in LR

I too went back to 3.6 and uninstalled 4.1.

I also failed to get a  refund, so sadly, I'm stuck with software that's

useless to me at the moment.

I hope that one day, there will be a patch that makes V 4 work to a

reasonable speed on a Win 7 machine.

howmanypigginnamesdoitry wrote:

 

I hope that one day, there will be a patch that makes V 4 work to a reasonable speed on a Win 7 machine.

Aaaaand here we go again...

Lr 4.x runs at a (more than) reasonable speed on my Win 7 machine already - no patch needed.

???

I get 30 mpg out of my RV, others with the same one only get 24.

I guess it depends what else you run, screen, HDD, memory, and all sorts

of variables.

I'm glad you get good performance, I can only hope for it.

I've only got a 2 gig CPU in a win 7 32 bit laptop.

Saving madly for a decent machine, but still unsure whether to go Win 64

bit or Mac.

FYI - I'm running Win 7 32 bit .... this is what helped me...

Corrupt preference files: http://photocamel.com/forum/computers-software/162752-help-lightroom-4 -1-slow-performance-problems.html

Negative caching - this from another poster (John Spacey)....... http://forums.adobe.com/message/4535489#4535489 (see #37)

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Here's an update on what changed in RC2 relative to Develop performance.

For starters, in RC1 we experimented with turning off sharpening while sliders were moving. We got a fair amount of negative feedback on that, and have reverted that behavior. Instead, we moved more of the rendering to a background thread, which keeps the sliders moving smoothly. One caveat with the behavior in RC2 is that those background renders can pile up if you're moving fast. The final 4.1 release will do a better job of trimming these when possible.

I worked with a number of you who volunteered to try an experiment a couple weeks ago that turned off something we call negative caching. The results were mixed; a couple people said it was a clear improvement, others didn't see a benefit. But I'll offer it here in case it helps others who find performance starts out reasonably then suddenly, consistently goes south until a restart.

What the following will do is turn off a cache which saves some of your most recent work done in Develop such that if you revisit a recently touched image, it loads faster. However, if our calculations are off, this cache can sometimes get too big and cause ACR to use virtual memory instead of RAM.

To try it:

1. Create a text file called “config.lua” and put the following line in it: AgNegativeCache.enabled = false

2. Launch Lightroom, go to the Preferences dialog, Presets tab, and hit “Show Lightroom Presets Folder”.

3. Close the Preferences dialog, quit Lightroom.

4. Drop the attached config.lua file into the Lightroom folder that was opened in step 2 (do not put it in one of the preset subfolders). So the path to the file will look like this:

Mac: /Users/[yourname]/Library/Application Support/Adobe/Lightroom/config.lua

Win: C:\Users\[yourname]\AppData\Roaming\Adobe\Lightroom\config.lua

You’ll know this switch to turn the cache off is working if you see the “Loading...” symbol even when you revisit the previously edited image in Develop. (When caching is on, you can often revisit a recently edited photo without the Loading warning showing.)

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