what you gain? free cpu power ... i once did some profiling on my performace patch an was suprised how much cpu usage line~ takes ...
hmm. is it really that much?
maybe i miss the point, but what you explained could be put in an external, no? like 'dezip~' or something, to make it just as fast as built in support for this (which i do not like either)
and, btw, [lop~] with a frequency of 5-10 hz works fine too. don't know if it's faster/slower than line~