Haven't tried performance mode yet. Going to dust off my MPD32 later and have a go
The experience so far has been very, very good. FL feels really snappy and responsive. For the last couple of versions I've sometimes gotten visual latency, even when the CPU count isn't that high (28% for example). That seems to be cured with this beta; no slowing down of the graphics, or stuttering.
Also my MIDI controller (UF7) seems slightly more responsive than it was before. I don't know if that's related to the above or because of the MIDI handling changes.
Whatever it is, I like it. Many thanks. I'll definitely be using this beta as my main version. It's way more stable than 126.96.36.199...