A new floating point format

Can express numbers from ~ 2^(2^(10^-308)) to 2^(2^(10^308))
https://www.reddit.com/r/frozenvoid/wiki/algorithms/data_encoding/logfloat

How easily can it be optimised and implemented in ASM? How does it compare in speed with IEEE floating points? How about its accuracy for the integer set? How easily can it be extended for more bits and how easy would a bignum implementation of it be?
What happened to Sugin?