Experiencing performance related issues in Lightroom 4.x

LR4 does seem to be more of a memory hog than LR3 for sure. It's using almost 8gb for me at the moment in Win7/64. I have 16gb ram and LR4 is superfast, but I imagine if I had 4 (or even 6 or 8), it would be swapping and performance would tank. Slow performance for people with fast machines makes no sense and is certainly not the case for everyone.

I,ve just read this announcement: https://blogs.adobe.com/lightroomjournal/2012/03/lightroom-4-hot-issues.html.

Looks like slowlyness of new LR is not a hot issue for adobe. Well, it is for me, majority of people posting on this forum and probably

for many more lightroom users.

I am running dual quad core Xeons with 12 gigs and a beefy iNvidia graphics card. Whay is LR4 such a sluggish POS? I have no ability to incrementally adjust any slider. Movement is in herky jerk chunks. I am not a 'that's close enough' kind of shooter, but that is about all I am able to get from LR4. How could Adobe release such a POS? I stayed away from the beta to avoid all these problems. I should have stayed away from LR4 all together! And please, don't tell me to do a clean system install. Don't tell me to convert my 400,000 image catalog to the new process. I have work to do for clients, not for Adobe's Enginnering Oversight committee. What a joke.

I do want to say that the some of the new develop module features are amazing....the tint, noise and temp brushes are brilliant ....ITS JUST THAT THEY ARE IMPOSSIBLE TO WORK WITH!

wow, this is interesting....when I move from photo to photo in Dev module, all the dev sub modules like tone curve, cam calibration, etc... ALL of this turn on then off       during the scroll....what I can't figure out is what is causing what.... is the slowness causing all these modules to switch on and off or is the switching the cause of such this unacceptable delay btwn each photo..... just wanted to share this.

so I subscribed to this thread...boy was that a mistake!  Given the HUGE number of issues with this and the nearly as huge number of fix ideas, why can't Adobe simply offer their 'official' recommendation how to upgrade from a prior version like delete previews, cache, etc.... There doesn't seem to be any one single way some folks are trying to fix this...and some try and succeed, some try and don't..... why oh why can't adobe just offer something up?  Adobe, are you listening??????

Sry Adobe - I having the same Problem and my lightroom 4 iss very very laggy and slow.

If you cant speed up, i dont buy lightroom 4

Photoshop CS5 ist 10 Times Faster on my System as Lightroom 4

THATS REALLY FU.....ED

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CPU:                            6 Core - AMD Phenom II X6 1090T 3,2Ghz Black Edition
Mainbopard :                 Asus M5A88-M Evo, AM3+, DDR3, SATA3, USB3.0

Grafik :                         HIS Radeon 5770HD 1024MB DDR5 DUAL DVI-I

RAM :                          4x4GB Corsair Vangeance CMZ16GX3M4A PC12800 1600Mhz @ PC10700 -> 1333Mhz
Working OS HDD :        Corsair Force Series 3 120GB SATA3 SSD 600MBIT
Working OS :                Windows 7 Ultimate
Monitor :                       2x Acer 23Inch Wiedscreens with 1680x1020px
Win 7 System Index :    7.5 (CPU 7.5 - RAM 7.5 - Aero 7.5 - Gaming 7.5 - HDD 7.9)

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Just adding my two cents as well, i upgraded over the weekend, and thought it was a mistake how slow export was. After having done several, I can say, it has nothing to do with beta (I had deinstalled it completely) and nothing to do with importing LR3 catalog stuff. I imported, massaged and exported 4 or 5 new sets and the exports which were simple resolution resizes and saves to jpgs were redonkulously slow.

Upgraded today, lightroom does a screen refresh/reload after each edit, its getting to the point where a refund seems like a good option. 2.8 i5 imac, 4g memory, and its like editing in treacle.

I know this was a cheap upgrade, but may have to go back to 3.6, unless this is a passing glitch this 'upgrade' was a complete and embarassing waste of money.

Just gone back into LR3.6, and on balance, I am going to junk LR4, I played with the LR4 beta, didnt get these problems, I like the new sliders and controls in the develop module, but as I dont use the book/video features, the downgrade in basic editing capability is not worth the upgrade(?) price.

Ditto on all accounts.  I have an Intel Core2 Quad Q9550 with 8GB on Windows Vista 64 with an Nvidia GeForce GTX280 and 10,000 RPM drive.   This is the workhorse my business relys on and I often process/cull 500-1000 images in about about 60-90 minutes.  Not anymore!! This will take all day on LR4 - totally unusable.

As noted by others, every slider movement brings image flicker and painfully slow redraws.  I generally resize every image and do so in LR3 in a scant flash few seconds. Even switching modules in LR4 is slow. Something is seriously wrong with LR4 and if I open Photoshop after LR4 it's even worse. This was not my experience on the the initial use - or even number 2 or 3 - but it started after I experimented with the MAP/BOOK modules, made a few imports and had the APP hang my computer.   I thought the app got corrupted do i reinstalled with no impact.  Since then the product acts like BETA - not a commercial grade release.

Lightroom 3, still installed, smokes and will have to suffice because too much to do and too little time to do it.

LR4 is horrible!

Well, on my system it is anyway

It's very slow and unresponsive compared to LR3, fans are running like crazy just for cropping a few images (high CPU heat) and overall conversion from LR3 to 4 is a nightmare.

this happened to a catalog iI used to test LR4 with:

LR3 import, no editing yet, besides lens correction (screenshot/cropped):

and the LR4 'conversion':

The 'auto tone' function isn't as much fun as I thought it would be either...

Auto tone LR3

and the same thing (yes I did reset the image both times!) in LR4:

If this doesn't get fixed soon I will just go back to LR3 and be happy with it.