On my 10-core Vega 64 iMac Pro, 10.4.7 on Mojave is about 2x faster on BruceX. In fact, it is so fast it's difficult to measure accurately using the normal procedure. I have to use five sequential BruceX timelines then divide the result export time by 5, which is roughly 5.2 seconds for a single one.
It is about 40% faster on rendering 4k ProRes 422 to 1080p H264.
Other things are not faster. As expected Neat Video is no faster since most of the execution path is in the plugin code. In general it appears built-in FCPX plugins which plausibly use Metal are a lot faster. Stabilization seems faster, esp. for the analysis phase. The degree varies with the specific effect and I haven't tested many of them.
I can't easily tell if the frame rate on FF/REV 4k H264 playback is faster since that is variable based on exact codec variant, scene complexity, etc.
HEVC doesn't appear any faster but I haven't tested it much. 10-bit HEVC output is still very slow, at least on my iMac Pro. It apparently doesn't use hardware acceleration for encoding 10-bit. As with prior versions 8-bit HEVC encode/decode is fast, also 10-bit HEVC playback seems fast enough.
Even on my ancient Mac Pro (2013) 10.4.7 is noticeably improved. I edit using BETTER QUALITY as opposed to BETTER PERFORMANCE because I just can't stand the constant transition from fuzziness to clear and back. And I don't use proxies and am often editing H.264 footage with transition and color gradings applied. Before, this came at a price, and that was often (not always) FCP would play a few frames, then hold on one for a second or two before playing the rest normally. With 10.4.7 this no longer happens EVER. I absolutely love it! It may export and render faster as well but I usually don't sit there and watch it as it exports or renders. I do other things with my life.
eGPU users have reported problems. You have to make the eGPU selection in the application. There seems to be a problem if you run the eGPU without a monitor attached to it. The eGPU doesn’t get used. There are a couple of lengthy threads on the Apple Support forum.
Over 4 Macs I use daily, some things are faster, some are slower. I do not notice an overall speed increase, really. Not noticing anything overall. Oldest is a 2015 rMBP, newest is an iMac Pro. Benchmarks look nice, but I'm not seeing it in my daily broadcast work.
FCPX.guru wrote: I do not notice an overall speed increase, really. Not noticing anything overall. Oldest is a 2015 rMBP, newest is an iMac Pro. Benchmarks look nice, but I'm not seeing it in my daily broadcast work.
That's been my experience too, which is why I say its both faster and slower.
From talking with a few other people elsewhere, I have high hopes for 10.5 and believe 10.4.7 is the last release (unless theres a fox for the speed tool) before 10.5
Getting less crashes overall which is a good thing, and in edit, everything from effects render to some heavier effects (like NEAT 5) are faster. I like that I can choose which card to use for renders.
Purely speculative- but based on how the text engine changed, and some other things Im seeing in crash logs and the Console, I would not at all be surprised if 10.5 will also run on iPad OS.
Also- Im really just excited theres been more updates overall.