I started quite a big project: dropped footage on timeline (Panasonic X1500 + GoPro + Pixel) & saved. Did not do anything else.

And then I faced "Out of Memory" issue when re-opening the project. Memory consumption goes up to max available and then VP crashed.

I enabled the "Experimental HEVC decoder" option and this is dramatically improved situation -- the project opened, memory consumption is stable while proxy are generating.

Are there any details what is the option doing and what should I look at to notice issues (if any)?
I searched the forum and people just suggesting to turn it on or off and see if it help. However, I'd like to find a bit more details if available.

Thanks.

P.S I have not tried to edit the project with the option enabled. Generating proxies atm.