I want to get information about compression methods that I will use most efficiently

[Masquerade]

LOLZ and xz are already multithreaded, and for LZMA use 4x4.

As for srep, that's a deduplication tool and really depends on your drive speed (note this is not encouraging the use of SSD - do not compress games on an SSD).

For most efficient methods, look here: https://www.fileforums.com/showthread.php?t=101639