the setting i used for zstd ver 1.1.2 IS
[External compressor:zstd]
header = 0
packcmd = zstd -22 --ultra <stdin> <stdout>
and for 4x4:lzma i used
arc a -ed -ep1 -lc2000 -r -ma -md -mx -s; -w.\temp -m4x4:lzma:a1:mfbt4:d185m:fb273:mc10000:lc8
only arc.exe witout srep or anything else.
if anyone have similar system I7 6700K with fast ddr4 and ssd nvme welcome to try and share the results..
i simple man trying to making sense of what i encounter
there article on pcper about how flash 3d nand accelerate data like burst write...
i don't know maybe this is the reason ?
if someone care to test and explain.
it does not matter to me like i said before i try to post what i experienced if someone find it useful great if not no need for hostile comments...