LZ4's performance can be impacted by slow storage (HDD vs. SSD) or CPU power management settings. Use the verbose benchmark output introduced in v1.8.3 to determine if CPU or I/O is the bottleneck.
LZ4 supports a range of compression levels, typically . Level 1 is the fastest and gives the lowest compression ratio; higher levels increase the ratio at the expense of compression speed. The default level is usually 1 or 2, depending on the build. lz4 v1.8.3 win64