Hi Nomad,
You are right about performance. We've been working for a while in lots of performance optimizations, specially stop depending in GAPI for backbuffer blitting, which is very slow on modern devices. Also, we've got our hands dirty and we've done several blitting optimization programming with ASM for ARM.
We are getting ready to release several of them in next Monday release. Of course, optimization work won't stop, however after Monday I'm sure you are going to see a big performance leap from current version.
Adding optional support for PocketHal as backbuffer is an interesting idea, We'll take that in mind, though there are some terms in PocketHal license which are not 100% clear, and that may prevent us from working with it.
Thank you for your feedback!
Best Regards,
Sergio.