Slow Lightroom Classic Export Speed v10.0

[The Guthrie Project]

Am I alone in experiencing a massive slow-down in export speed with the new Oct 2020 Lightroom update? I regularly export batches of photos to full-res 45Mp JPG in quantities of anywhere between 200-300 photos at a time. This prcoess usually takes about one hour to complete. Now that I have the latest, greatest, whiz-bang update of Lightroom Classic installed, an export of 272 photos took TEN hours. Simialrly, exports of a similar quantity of photos to 2048pix screen-res files used to take 5-10 mins in the previous version of Lightroom, but is now taking 30-40 mins in this latest version. The only thing that has changed at my end is the version of Lightroom that I am running. This is clearly not an upgrade. 

Adobe, in future when you decide to release such crappy updates into the world, please provide a clear and honest notice that you have decided to dramatically criple essential elements of your software. 

[GoldingD]

Please post your System Information as Lightroom Classic (LrC) reports it. In LrC click on Help, then System Info, then Copy. Paste that information into a reply. Please present all information from first line down to and including Plug-in Info. Info after Plug-in info can be cut as that is just so much dead space to us non-Techs.

[GoldingD]

And, this community site is largely devoid of Adobe Techs. Mostly fellow users.

To complain to Adobe, post at: https://feedback.photoshop.com/topics/lightroom-classic/5f5f2093785c1f1e6cc40872?cType=PROBLEM&page=...

And, somehow I suspect MACOS, Looks like Adobe has a major FUBAR, LrC v10 on MACOS.

[The Guthrie Project]

Thanks for the feedback GoldingD. My system details are below. 

I'll also try posting via the feedback url above, as suggested. 

Cheers, 

Ben 

Lightroom Classic version: 10.0 [ 202010011851-ef6045e0 ]
License: Creative Cloud
Language setting: en
Operating system: Mac OS 10
Version: 10.15.7 [19H2]
Application architecture: x64
Logical processor count: 12
Processor speed: 2.9 GHz
SqLite Version: 3.30.1
Built-in memory: 32,768.0 MB
Real memory available to Lightroom: 32,768.0 MB
Real memory used by Lightroom: 2,905.3 MB (8.8%)
Virtual memory used by Lightroom: 13,028.7 MB
Memory cache size: 178.2MB
Internal Camera Raw version: 13.0 [ 610 ]
Maximum thread count used by Camera Raw: 5
Camera Raw SIMD optimization: SSE2,AVX,AVX2
Camera Raw virtual memory: 78MB / 16383MB (0%)
Camera Raw real memory: 81MB / 32768MB (0%)
Displays: 1) 3360x2100

Graphics Processor Info:
Metal: AMD Radeon Pro 560X

Application folder: /Applications/Adobe Lightroom Classic
Library Path: /Users/username/Pictures/Lightroom/Catalogues/Lightroom Catalog v10.lrcat
Settings Folder: /Users/username/Library/Application Support/Adobe/Lightroom

Installed Plugins:
1) ColorChecker Camera Calibration
2) Facebook
3) HDR Efex Pro 2
4) JPEGmini
5) LensTagger Exif Tool
6) LRT Export 5
7) Nikon Tether Plugin
8) Teekesselchen

Config.lua flags: None

[The Guthrie Project]

UPDATE: 

Further to above, and based on a suggestion on a different Adobe Feedback forum, I’ve now completed a second print-res export and screen-res export of these same 272 files, this time with the old 32-bit FaceBook and HDR Efex plugins disabled. The result is that export times are now generally improved: the print-res export took 40 minutes this time, and the subsequent, separate screen-res export took another 34 minutes. 

Based on my experiences with previous versions of LR, the print-res export feels a touch quicker than older versions (and much, much quicker than my ten-hour horror-export yesterday). The 2048 pix screen-res export, meanwhile, still seems slower. Similar screen-res exports of roughly this quantity of images used to take no more than 15 minutes in previous versions of LR.