: Hashcat decompresses the data in memory on the fly. Usually, your GPU is the bottleneck, not the CPU decompression, so you won't see a performance drop. How to Do It (The 10-Second Guide)
To use a compressed wordlist, the syntax is identical to using an uncompressed one. For example: hashcat compressed wordlist
bzcat wordlist.bz2 | hashcat -m 0 -a 0 hash.txt : Hashcat decompresses the data in memory on the fly
xzcat massive_wordlist.xz | hashcat -a 0 -m 1400 hashes.txt - your GPU is the bottleneck