Experiencing performance related issues in Lightroom 4.x

Possible solution: I left LR4 running for 10 hours w/o using it and now it's much faster, almost at LR3.6 speed. Perhaps it was converting my large catalog (82K photos) in the background which was slowing everything? I hope the speed lasts!

The Lightroom team is investigating this problem. Right now we attempting to nail down the specific issue/ issues. Just be aware that development may go dark on the forums while trying to research this problem. In addition we may be contacting people individually for more information.

Thanks,

Jeff Van de Walker

Lightroom QE

dumb question...how do I know if a file has a preview generated already in the Library Module...? 

I've now tried so many different things to speed it up I'm losing track of which variables I'm playing with.  For me, dual display doesn't make a diff unlike many of you... I was hopeful that creating a new catalong and importing everything again would help and I thought it it...In Library Mod, it seem to have sped up just a bit but still not a quick as 3.6 ( I regenerated previews as well)... In Dev Module its made NO difference- loading each file takes 2-3 seconds during which time everything greys out while it trys to read the RAW file.. .Someone posted that the 'engine' used to pain RAW files in Dev is the RAW file itself, while in Lib, its the LR preview file.... This could help to determine the root cause perhaps....

I've not messed with any other setting like noise, lens correction, etc...This is a direct import of CR2 files from Canon 5D MII and its still not usable in the Dev Module.  Back to 3.6...

Will Adobe refund an upgrade???

I installed Lightroom 4 on a newly setup Windows 7 64bit computer and if I compare it to Lightroom 3.6 (running on a 5 year old box with an Intel Quad Core processor & 8GB Memory), Lightroom 4 is very sluggish with most adjustments, things get even worse when I enable viewing on a second monitor.

Adobe, believe us, Lightroom 4 is SLOW!!!!

Computer configuration:

Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz, 3401 Mhz, 4 Cores, 8 Logical Processors
Microsoft Windows 7 Ultimate x64
16.0 GB Physical Memory (RAM) (4 x 4096MB DDRIII)
1 x 240GB Kingmax SATAIII 2.5” Solid State Disk (Operating System, Programs Lightroom Catalogues & Caching)
2 x 1000GB Seagate SATAIII 7200RPM Drives
Nvidia GTX560TI 2048MB Graphics Card.

All hard drives are less than 30% full with no fragmentation of any files.

just thought i would update my info, had a chance to work on LR4 again tonight to see if i could get it flowing. Here is some details of my personal issues. none of which i had with LT3

my system update:

Dual monitors. Loupe view. (A MUST)

AMD Phenom II X4 965 Black Edition Deneb 3.4GHz Socket AM3 125W Quad-Core Processor

Win 7 64bit

12 gigs ram

HIS H467QR1GH Radeon HD 4670 1GB 128-bit DDR3 PCI Express 2.0 x16 HDCP Ready CrossFireX Support Video Card

2 External 2T ESATA drives (500K images or so) .CR2 Files

slideshow works nice, and library mode is fine.... little lag there, but for me it's not bad.

in develope mode... as i start to edit an image (dual monitors on) the more i edit the more it lags to the point on complete 5 second frustration.... sliders wait seconds to move then jump.... everything just starts to lag dramatically to the point of total frustration. Of course unselecting details section helps.... as does turning off the dual monitor view.... slightly, but, i'm really hoping this isn't they way I'm expected to use the software.

some other notes: works really nice on my macbook pro with single monitor view and a DRAMATICALLY smaller catalog. Just a little sluggish if i get to crazy with edits and detail perameters. Otherwise, very useable in this way.

thanks everyone for all the posts... good to see i'm not alone on this.

my system:

i7 2600k @ 4.2 GHz

16 GB ram

240 GB Vertex 3 SSD (for catalog and preview)

geforce 460 GTX 1GB

win7 64 bit

i had the beta installed before. i removed LR4 BETA and the LR4 BETA catalog prior to installing LR 4 final.

im working with a fresh test catalog (not imported from LR 3.6) that contains ~9000 images.

the LR 4 final works MUCH smoother end responsive then the beta.
the beta was nearly unuseable. the sliders moved like snails.

but.... i have the impression that LR 3.6 was a bit faster. not much but a bit.

especially switching from the library to the develop modul feels not so fluid anymore... i think there is a small lag (but maybe it´s just pure imagination).

overall i can not complain about speed with my system.... but i don´t know how things look on slower systems.

Sick of the speed issue, I have tried two things:

First I deleted Camera Raw cache & the entire Previews folder, then rebuilt all previews (1:1)

This made no difference

Then I renamed my old catalogue, restarted LR4, created a fresh catalogue and imported all my images, creating 1:1 previews on importl finally I read in metadata from disc.

This seems to have improved matters somewhat - there is still a noticeable but not unbearable lag when zooming, but more importantly, sliders are no longer laggy - it works about as well as LR3.6 in this respect.

For me this wasn't too much of a hardship as I have less than 3K images.

The major downside is I have lost all the autostacked raw+jpg/virtualcopies, and detailed history for each edit.

If this improvement is not sustained as time goes on I will of course report back

Hey guys.

sparksdjs is right. You should report this:

http://feedback.photoshop.com/photoshop_family/problems/common

Right now there are only 39 persons (including me) reporting this.

The thing for me is that I have 8 gigs of memory and with Chrome running and LR4 going I'm using 49% of my memory but as soon as I move the Blacks slider all four cores of my AMD 965BE quad-core running at 3.4ghz will jump to 80-85%.....just to move one slider a tiny bit and it is very jerky. This is on Win 7/64bit. Oh, and this is using my second monitor, turning it off improves things quite a bit. Also, my video card is a PNY GTX 560TI.