I was curious about the choice of an immediate mode rather than retained GUI toolkit.

Could you speak a little more about the trade-offs and decisions there w.r.t. performance.

(Nice work btw, seems very interesting!)

C.f. this comment[0]

[0] https://news.ycombinator.com/item?id=49519099

Thanks for the link, I responded there: https://news.ycombinator.com/item?id=49519723