Hi, For a comparision I use a HP Pavillion DV-4 (3 years old) for my travelling machine and it has the following set up:

Lightroom version: 4.1 RC [820174]

Operating system: Windows 7 Home Premium Edition, Version: 6.1 [7601]

Application/System architecture: x64

Physical processor count: 2 x 2.5 GHz (Dual Core Centrino 2)

Built-in memory: 4062.9 MB

Real memory available to Lightroom: 4062.9 MB

Real memory used by Lightroom: 458.0 MB (11.2%)

Virtual memory used by Lightroom: 484.5 MB

Memory cache size: 276.3 MB

System DPI setting: 96 DPI

Desktop composition enabled: Yes

Displays: 1) 1280x800

Adapter NVIDIA GeoForce 9200M

Dedicated Video Memory 512 MB

Typically it will take up to 10 seconds to start-up Lightroom 4.1RC and the first time I switch to the develop module it may take up to 5 seconds. After that there doesn't seem to be any lag in either processing or using the sliders. The

My typical workflow is: 1) Import CR2 files; 2) scan and mark those for rejection; 3) delete rejected photos; 4) convert all that are left to DNG deleting the originals.

My desktop machine is a Sony Vaio VPCL-218FG with 2 x i7 quad core processors (8 physical processors) with 8GB ram, 1024MB video memory (NVIDIA GeoForce GT540M) and that is a lot faster.

Hope this gives you some idea of the configurations that seem to work.

That one is outdated.

Use this:

http://feedback.photoshop.com/photoshop_family/products/photoshop_fami ly_photoshop_lightroom

OMG!  I just tried to edit a small set of photos in LR4 and moving around is painfully slow indeed compared to LR3.6.

All I did was go into Develop, crop the image, press "2" to set the rating and press "G" to go back to Library.  From the moment I pressed "2" followed by "G", it was more than 15 seconds to get to Library.  In LR3, that was like 2 seconds.

WTH did Adobe do to slow it down so much for the same exact steps?

Whew!  I thought it was me.  Misery loves company so I'm glad to hear I'm not the only one that is two days behind deadline on a client's project because LR4 is taking so long to render images, change from one image to another, apply a brush stroke, and crashing!  At first I suspected it  might be the new Seagate external hard drive I was using, so I moved the entire folder of images (3300 images) to a hard drive I know works well.  Same thing.  So then I moved the entire folder of images right onto the Mac under Pictures, to make certain it isn't an issue with external HDs in general (I don't normally keep images on the 1TB internal Mac drive; I am only using 1.6GB of space with all my programs and have 10GB RAM).  Same problem.  Photoshop, Word, Outlook, Acrobat, et al, are working normally.  The images only bog down in LR4.  I don't believe the LR4 images are backwards compatible with LR3 or I would dump the new program.  Anybody else have any ideas?

I went in last night and upped the Camera raw cache... (  Edit/Prefrences/Filehandling/ ).... to 20.0 and it seemed to help things a little....

Just curious...  this is a very old thread. Are you guys using LR 4.1

RC?   There is a version out there which does improve speed but not for

all sliders and multi-monitor options.  ADOBE says they are working on

the issues of performance... it has been several weeks and I like the

new features so I put up with the poor release. I can run either version

and I am not going backward. Note... if the 4.1RC version had not come

out I would have asked for my money back.

I am using 4.0 with Camera Raw 7.0.  When I check for updates through LR it says my software is up-to-date.  I will go to the Adobe site and see if I can locate 4.1.  In the meantime, I have tried Madscapes suggestion and upped the cache to 80.0; don't notice much difference.  Thanks, Madscape.

Addendum: I just went to adobe.com and the only LR update I see is for LR3 posted in December.  If someone knows where they are hiding 4.1 I'll give it a shot.  Thank  you.

http://labs.adobe.com/technologies/lightroom4-1/

Re-download.  Something probably happened during download.

I couldn't simply RUN the program, I downloaded the folder onto my desktop ..But it did open for me ..Now when I try to toggle over to CS5 it says I need CR6.7 ( instead of 7.0 ) yet when I go to the adobe site It won't download...also..The 4.1 isn't any faster than 4.0 was ...I'm seriously considering calling Adobe and getting my upgrade money back . I was very content with LR3 .I only upgraded to ....well...upgrade : < /   

Also ..when you toggle to CS5 ..they do give you the option to continue anyway ...I tried it and when trying to work a layermask with my Intuos 4 tablet ..the adjustment brush size doesnt show when turning the thumbwheel on the tablet .... Enough for me to say " goodbye " and log out ...

Thanks.. I just installed it ..will try it tomorrow ...Man I was hoping for a lens profile correction for my Tokina 11-16  in version 4  : (-

But I did try one thing ...I toggled to CS5 and the tablet brushes and controls seem to work ok ... 

I created one for the Nikon version of this lens ages ago that's on the

lens profile downloader list that does get autoapplied for me at least

"I was very content with LR3"

Then just set the process version in LR4 to PV2010 and voila, LR3 controls and performance in LR4.

I just noticed that zooming in and out is slower than RC1. For me, that means the 3D settings on my video card are incorrect. Because Lightroom RC2 loads in a new folder, the settings on my nVIDIA graphics card are reset back to default. With those settings I have all sorts of trouble in Lightroom. I setup the same application settings I was using for Lightroom 3 and RC1, and now my sliders are working great, and zooming in and out is quick.

I am using a laptop with an embedded NVidia Quadro FX 2700M video card.

I had a previous post about what 3D settings I use, but will repeat them here in case anyone else wants to try. Those with the * are the ones that I have changed in the application profile for Lightroom:

• Anisotropic Filtering:  Off

• Antialiasing – Gamma Correction:  Off

• Antialiasing – Mode: Override any application setting

• Antialiasing – Setting:  2x (2xMS)

• Antialiasing – Transparency:  Off

• Buffer-flipping mode: Use block transfer

CUDA – GPUs: Use global setting (All)

• Enable overlay:  Off

Exported pixel types: Use global setting (Color indexed overlay)

Maximum pre-rendered frames: Use global setting (3)

• Multi-display/mixed-GPU acceleration: Compatibility performance mode

• OpenGL rendering GPU:  Quadro FX 2700M

• Power management mode: Prefer maximum performance

Stereo – Display mode: Use global setting (Custom)

Stereo – Enable: Use global setting (off)

Stereo – Swap Eyes: Use global setting (Off)

Threaded optimization: Use global setting (Auto)

• Triple buffering: Off

Texture filtering – Anisotropic filter optimi: Off

Texture Filtering – Anisotropic sample opti: Off

Texture filtering – Negative LOD bias: Allow

• Vertical sync: Force On

I hope this helps!

Geoff

Upgraded to RC2, overall seems much better performance than RC1. It is still slightly slower than 3.6 but getting better. I'm having no problems with zooming in and out, module changing or memory. I have an i7 machine,SSD drives and 12 gigabytes of RAM with external eSATA drive array and a Nvidia GTX470 video card. One thing that I did notice was the change in the CA removal and Defring sliders, Adobe must have been listening to everyone's complaint about CA sliders because the new implementation is nothing less than spectacular! Best CA removal tool I have ever used. There does seem to be some tweaking left to do, but this is an amazing start.

My LR4 is extremely slow capturing photos and video.  It took approx. 25 minutes to capture 71 RAW + jpg files.  This is totally unacceptable.

System:

I7

16 gb RAM

356 gb SSD

1.5 tb drives for Data

LR 3 was much faster.........what can I do to improve performance?

Thx,

PhilR

RC2 no diff for me...what P*SSES me off to no end is not being able to process my RAW images with 3.6...My fault for buying a new camera I guess (5D M III)  very very irritated...