B7+Cineform good news

Resolve v15 B7 has added fractional resolution decoding support for Cineform files (BM says nothing about it in release notes).
When you're in performance playback mode and choose half/quarter resolution in proxy setting (assuming you didn't alter setting for performance mode in user preferences) then Resolve does decode Cineform files at reduced resolution.

What good does it do?

4.6K 12bit RGB Cineform file (2Gbits/sec) in UHD project, edit page (performance playback mode, Show All Frames), quad i7 2.7 GHz MacBook Pro:
-proxy OFF: 12-16fps, CPU=40-60%
-proxy 1/2: 24fps, CPU=24%
-proxy 1/4: 24fps, CPU=11%

All what we need now is Cineform RAW in BM cameras and we are sorted for RAW editing, even on laptops

If your GPU is weak just lower project frame size and you can still edit even 4.6K 60p Cineform.

As a another test I converted ARRI RAW to Cineform RAW.
Playing UHD Cineform RAW at 24p uses <20% of CPU on my Mac. If you add on top of this possibility to decode/debayer at 1/2 etc resolutions you could work with 8K on laptops with Cinefrom RAW
With CinemaDNG CPU is almost at 100% for 4.6K and there is nothing what can be done about it.

Playing CF RAW in Switch player (which needs also do simple debayering on CPU) uses about 35% CPU. This is also cool feature- codec has "embedded" simple debayering, so you can easily preview CF RAW files.
Difference is HUGE. CinemaDNG is so inefficient.

BM -could we please have at least simple RAW tab for Cineform- at least debayering resolution choice.
Also- fractional Cineform decoding is currently not working for Cineform RAW.

Andrew, did the render speeds to cineform get increased? haven't tested it yet.

Don't know.
I'm using old cmd line tools for converting RAW camera files to RAW Cineform.
Was it slow?
Cineform export should be very fast as one of its features is about same decoding/encoding speed. Rest is down to implementation.

Is this using native cineform files? Or using it as a codec for optimized media?

It should not matter ( I don't really use optimised media). If I have to, I convert outside Resolve.

This is interesting. CineForm YUV 10-bit UHD works very well using quarter resolution proxy mode on a low end MacBook Pro 2015 without a dedicated GPU. Solid full frame rate.

But, if the file is 4K DCI instead of UHD, it's as if the proxy mode isn't helping at all. I get 15-16 fps regardless of proxy mode setting (even off).

This is in Resolve Studio v15.0.0.086.

This is strange, maybe bug.
It should work regardless source resolution ( at least as long as it nicely dividable by 2/4/8 etc).

It will work well as UHD file at 1/4 resolution becomes just 960x540 file, so it's like your source would be about 1K. This is the beauty of it. It's full quality and different resolution proxies in 1 master