jhapeman
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 p.1 #3 · p.1 #3 · Big Performance Boost Lightroom Classic 11.4 Exports (Macs Only?) | |
CanadaMark wrote:
Something fishy is going on with your Threadripper machine I think.
I'm shooting a Z9 with similar file sizes to the A1 and it would not take anywhere near 13 minutes to save 1400 files to full sized JPEG (Saving 100 files takes well under 1 minute), and that is on a Ryzen 5950X with 1/4 of the cores in your Threadripper. While many things in Photoshop are single threaded, the batch saving process should be able to use as many cores as you can throw at it, though I can only verify this to 16 cores.
A couple things to note:
1) Just doing basic math you are a bit off: If it takes your machine under a minute for 100, then 14.65 x 100 will be a lot longer and not too far from the numbers I saw unless "well under a minute" means less than 30s. In addition, unless you have the exact same settings and files you can't make true comparisons. Just adjusting the dpi can alter export times; different file types from different cameras can have quite different results. This is why I have continued to use the exact same set of files across multiple computers for these tests.
2) Many tasks do not scale linearly with core count; exports come close but they don't make it. They also don't scale linearly with a small file number to a large file number. I started doing tests with just 100 files and the differences were there but subtle. The reason for buying a hard-core machine is for the ability to really stress it, and when I increased the file count to 1465 it starting to really show the differences.
3) My 64-core TR is the older 3995WX model, and it runs at a lower base clock and turbo clock than your processor, so again, one can't compare directly. It was originally purchased for 3D rendering where the core counts are far more critical than raw speed per core; for pure photography work the 24-core is probably the sweet spot for raw performance per core and core count. BTW, on many tasks the newer 5995WX significantly outperforms the older 3995WX because of the improvements in the Zen 3 architecture, something your chip shares and mine lacks.
4) My surprise about the TR in this run is that it got slower; not necessarily the overall speed. When I last tested it on LRC 11.2, it still took 13 minutes and 31s to export the 1465 files. I expected it to be faster, not slower, since there is a very powerful GPU in the AMD box. In fact, I expected something similar to what I saw with the Mac Pros, where performance jumped 45%.
All of that said, I did monitor the core use on the TR machine while processing and it did show an odd behavior that I've seen before with tasks on this machine--it would spike all of the CPUs in cycles, all the way up to 100%, then down to 30% or so, then back up. I'm not sure if that's an issue with LR or Windows or the way the TR works.
All of this aside, the performance gains on the Apple Silicon machines are just remarkable. I can't recall the last time I've seen such a huge performance bump with just a software update. It also is gratifying that Adobe is continuing to put efforts into increasing performance across the board in Lightroom (I suspect there's some quirky reason the TR didn't see a similar jump that the Intel Macs did, and I expect that it will once it's figured out).
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No Lr here, so will be C1. On imports, it is slow like 1 sec per file, with SD card in the Mac.