DEFLATE at level 6 is really doing 10 MB/s, doesn't matter if you're using gzip or zlib or another library. slz is closer to level 20 (if there was a level 20)

DEFLATE at level 6 is really doing 10 MB/s, doesn't matter if you're using gzip or zlib or another library. slz is closer to level 20 (if there was a level 20). It's fast but the compression ratio is meh. You're better of using lz4 or zstd.