P: High CPU usage makes it unusable during export

I love the fact that LR now uses all my cpu during export - gets it over much faster! I have a cup of coffee, read a book (remember those things made of paper?), or go to bed while its doing its stuff!

Bob Frost

Not good at all. A much less aggressive CPU usage would be much better. Even the mouse stops moving... Imagine, users want to work on another tasks during a lengthily export!
The IT team needs to reconsider things from the user's point of view, not regarding the export thread's performance!

I would also like an option to limit cpu usage by the export process, I am a working professional photographer and I don't care how long exports take. More important is the ability to use lightroom during an export, which is currently impossible. 

For those who have suggested changing the process priority, it does help a little but is far too cumbersome a procedure to do regularly. 

Please add this feature Adobe!

Set your Lightroom process priority to Low (instead of Normal) and you'll have a working responsive machine again. I'm only on an i5-6600k and I can watch full-screen 1080p youtube while exporting (at the cost of prolonging my export of course...)

Ever since I updated Lightroom to the current version (Lightroom Classic version: 8.3.1), I haven't been successful in exporting pictures after edits. Within seconds of the the export kicking off, the machine freezes up and the screen goes blank. I started monitoring the CPU during these windows and found that the CPU was pegged at a 100 % and Lightroom was the heaviest user. I understand that this was a feature add for faster processing and better utilization of the system resources but in cases like mine, I am unable to finish the job because the system wouldn't recover after this freeze. Only a hard reboot brings in back up. After playing around a lot with the settings (performance tuning etc), I finally found a workaround - Just before the export, I went to the system Task Manager > Details > Lightroom.exe and set the affinity so that it doesn't use all the CPU cores. That way, during the export, the system wasn't hitting the 100 % CPU mark and the export finished. It has become very frustrating as I had to hard reboot my machine about 15 times before I got here. Many of us don't have the luxury of dedicating one machine for Lightroom use only. I can't have one software take up all the juice and crash the entire system.

My machine specs - 

Lightroom Classic version: 8.3.1 [ 201905241238-dcd7e2de ]
License: Creative Cloud
Language setting: en
Operating system: Windows 10 - Business Edition
Version: 10.0.17763
Application architecture: x64
System architecture: x64
Logical processor count: 8
Processor speed: 2.8 GHz
Built-in memory: 32586.0 MB
Real memory available to Lightroom: 32586.0 MB
Real memory used by Lightroom: 1014.9 MB (3.1%)
Virtual memory used by Lightroom: 1207.6 MB
GDI objects count: 619
USER objects count: 1902
Process handles count: 1784
Memory cache size: 167.4MB
Internal Camera Raw version: 11.3 [ 197 ]
Maximum thread count used by Camera Raw: 5
Camera Raw SIMD optimization: SSE2,AVX,AVX2
Camera Raw virtual memory: 262MB / 16293MB (1%)
Camera Raw real memory: 263MB / 32586MB (0%)
System DPI setting: 120 DPI
Desktop composition enabled: Yes
Displays: 1) 2560x1440
Input types: Multitouch: No, Integrated touch: No, Integrated pen: No, External touch: No, External pen: No, Keyboard: No


Graphics Processor Info: 
DirectX: NVIDIA Quadro M1000M (25.21.14.2545)

In Lightroom 8, when exporting virtually nothing can be done due to excessive CPU usage. Even the mouse cursor is frequently frozen for seconds.
I suggest limiting the CPU usage for the Export thread (as it was in earlier versions).

Would it be possible to speed up Lightroom Classic Export operations with GPU acceleration?
It's great to have some GPU support in the develop module, but exporting takes nearly all my CPU resources. Why has this not been done already?

Image is not available

Exporting images makes pc almost unusable, in the past the exports were much slower but I could perform other tasks on my PC, sometimes something as simple as watching YouTube on my secondary monitor. The new version is much faster but renders my i7 8700k, gtx 1080 and 32gb if ram useless as far as multitasking. Watching a YouTube tutorial while exporting raw files to JPEGs constantly causes YouTube, mouse and windows to freeze as well as an occasional black screen flash.

Export is maxing out my CPU, making it impossible to do anything else in LR or PS while the export is running. Everything else on my PC runs super slowly while the export is running. I don't mind if exports take longer, but I need to be able to kick off an export then go do something else with my PC. It's also preferable to me to be able to do other tasks within LR while the export is running, over having a slightly faster export time.