It would be useful to know:
1. What operating system you're using
3. How much ram you have
4. Is catalog on SSD or spinning hard-drive
Yeah, I am having the same issues as of a month or two, now, and am ready to give up on LR. It can take upwards of a minute to handle similarly sized RAW images, and has become almost complete useless. With LR on, all the rest of my apps get bogged down, too. I'm well past minimum performance specs, too.
Two quick troubleshooting steps that help many (but certainly not all or even most) users with performance issues in Develop:
- Uncheck the option Preferences > Performance > Use Graphics Processor.
- On Windows, update your graphics driver by going directly to the manufacturer's Web site: Adobe Lightroom GPU Troubleshooting and FAQ
My PC specs...
Windows 7 Professional
Intel Core 2 Duo CPU E8400 @ 3ghz
4GB Installed Ram (3.84GB usable)
Program is running off the harddrive no disk.
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Unfortunately, 4GB of ram isn't going to be nearly enough with Lightroom, especially in Develop mode. The 'recommended' minimum is 8GB, but 16GB would be better.