Terrible timeline performance

I know this is an age old question around here...BUT...why am I getting about 2-3 sec / frame playback on my timeline? This is a clip that is 2) 6k braw clips into a fusion comp with only a single delta keyer. No color or other effects. CPU / GPU / RAM barely being used. Cleared cache, Removed high quality and motion blur in Fusion, cleared Fusion cache, no other programs running. On a brand new computer (specs below) and besides final rendering which is blazing, upgrading from an 8th gen i7 with an 8GB 1070 and "only" 32GB of RAM and an earlier generation hard drive has not sped Resolve up at all. So it's clear that system specs don't really affect the speed of Resolve. Not using proxies because they don't play well with Fusion or Color (aka Davinci Resolve.) So I guess the question is...why can't BM Resolve play back BM RAW files?

Sorry, I'm more than a little frustrated. I could have spent that $4k on producing a movie but chose to upgrade my Resolve computer with the presumption that the software would work better as a result.

Can you post a project (maybe use braw files from https://www.blackmagicdesign.com/produc ... ra/gallery) that we could compare performance with?


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I know this is an age old question around here...BUT...why am I getting about 2-3 sec / frame playback on my timeline? This is a clip that is 2) 6k braw clips into a fusion comp with only a single delta keyer. No color or other effects. CPU / GPU / RAM barely being used. Cleared cache, Removed high quality and motion blur in Fusion, cleared Fusion cache, no other programs running.

Trying to do a Fusion comp from Braw material on a 16GB laptop... that's not an ideal combination. If it were possible, I would upgrade to at least a 64GB system (or even 128GB if possible) for Fusion. If it's just one shot, you could render-in-place and live with it that way.

Note that Resolve speed is almost always dependent on system power (CPU, RAM, GPU), I/O speed (drive speed, formatting, and connection), and choice of source material codec. Drivers and OS can of course have an effect as well, as can timeline settings, timeline length, resolution, speed, render cache, and so on. External RAIDs with fast connections will yield better performance most of the time, as can SSDs. Slowdowns can also occur due to highly-compressed codecs (like H.264/H.265), high frame rates, Fusion compositions, Magic Masks, OFX plug-ins, noise-reduction, or Optical Flow speed-changes that stress systems resources.

Jason Bowdach has more to say about Resolve performance in this article:

https://blog.frame.io/2020/02/24/davinc ... rformance/

Trying to do a Fusion comp from Braw material on a 16GB laptop... that's not an ideal combination. If it were possible, I would upgrade to at least a 64GB system (or even 128GB if possible) for Fusion.

Check his sig for the machine he’s having trouble with.


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Yeah - the OP has a very powerful machine there - would expect better performance. Maybe something wrong with the delta keyer in Fusion pipeline? Try some other Fusion effects instead to see their relative performance? Would be useful to have that sample project (maybe a short one with media via a Resolve Archive).