Hey there! I'm trying to cut down on 20XX's load times, and a good chunk of it is the JSON stuff we're loading in through Spine.
After some searching, it looks like binary format loading isn't part of the spine-c runtime yet. I found this post:
http://zh.esotericsoftware.com/forum/Binary-format-loader-for-C-Runtime-4294?p=20776&hilit=binary#p20776
and wrote a quick header for it/added it to our project, but it's missing a few things (seems to mess up some animations, doesn't load bounding boxes at all, etc).
I might be able to look at the java (libgdx) skel binary stuff and fix it, but I wanted to check in and see what the official plans are for updating the spine-c runtime to import your editor-exported binary format. If it's anywhere near happening, I might push off and wait for the good stuff
else I'll try and hack it together myself some weekend soon.
The binary format page (http://esotericsoftware.com/spine-binary-format) is a stub - is there documentation available anywhere for it?
Thanks!