multicore
About multicore utilization ...
- At the present moment, there are thousands of users with new and powerful multi-core CPUs with plenty of power not utilized by Adobe's programs. An Adobe response to the demand that Adobe focus on this issue is that "it is difficult" ...
You are a big company, you can solve it - so solve it.
Using the excuse that it is difficult to solve is just silly and provocative - you have to prioritize this issue!
I'm sure you will get incredibly positive reactions from many users if you focus on speed and core utilization in the next updates - especially with the new CPUs that are currently released.
Clock frequency and speed are more or less stagnant, while the number of cores is increasing dramatically with the release of new generations of CPUs.
Right now, it is becoming more and more frustrating to have more and more powerful computers - which are well utilized by other software - while the experience is that Adobe's programs utilize only a fraction of PC potential.

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David Bixler commented
So it's necro, but recently Adobe added Multi-Frame rendering in the beta. YT has a few vids on setting it up. It's painless.
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Christopher Jeffries commented
Oh look! I built a new workstation! (Specs: https://pcpartpicker.com/user/Cx/saved/gWRk99 )
What's amazing: Cinebench scores are fantastic! Lowest rendering time (quickest!) of the many years I've been running the AE Total Benchmark scene! Everything else I run other than AE is much improved!
What's not amazing: AE previews are still slow and the UI is laggy. And there's seemingly nothing I can do about it.
PugetBench results: Overall score of 1156. (The School of Motion article listed in the response from Victoria Nece shows a score of 985.)
https://www.pugetsystems.com/benchmarks/view.php?id=8834CPU-Z benchmark results: 16336 (multi thread) / 499 (single thread)
https://valid.x86.fr/bench/mdpwvqI am beyond frustrated at the state of this application. It is, without hyperbole, the greatest pain point in my professional life.
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Sebastien Perier (AE Quality Engineer) commented
Hello Ultra User,
Our Sr. Product Manager already answered this question on this UserVoice thread:
https://adobe-video.uservoice.com/forums/911311-after-effects/suggestions/33836305-full-program-multi-threaded-supportHere is the relevant quote to multi threading:
We all recognize that After Effects would benefit from additional general-purpose multi-threaded rendering. And while we can’t get into specifics here or make any promises about our future roadmap (that’s all confidential when you’re a publicly traded company), we are actively working on multi-threaded CPU rendering.
Hope this answers your question.
Seb