this massively speeds up efreet's icon cache building for huge icon
themes... in my nasty test case of some insanely huge icon themes that
have like 50,000 - 100,000 files... each - and multiple where the icon
cache has to scan all of them and build the cache files... i see a
speedup of going from 80 seconds to build down to 15-16 seconds. so
over 5 times faster.
This builds the dictionary in a temporary eina superfast string hash
in ram and then just before writing flattens it out into a regular eet
dict format.
@opt
Carsten Haitzler
d08bb74255