CLS-Srep

[Bulat]

srep doesn't need multithreading. or, srep is m/t already, but second thread is only 10% or so of the main one. and srep offloads i/o to separate thread

let's see - in -m3 mode, you can use higher -a value to boost speed. with -a16 i get >500 MB/s - much-much fasterthan any lzma

in -m4/m5 mode it has even less computations to perform, but limited by I/O speed. yeah, on SSD multithreading I/O should be a good idea - you are right here

lzma may be multithreaded too, like lzham/rar5