Indeed for in-memory decompression LZ4 is much faster as expected: $ time ./LZ4Demo.exe -d /tmp/out.lz4 /dev/null *** Compression CLI using LZ4 algorithm ,

Indeed for in-memory decompression LZ4 is much faster as expected: $ time ./LZ4Demo.exe -d /tmp/out.lz4 /dev/null *** Compression CLI using LZ4 algorithm , by Yann Collet (Jul 25 2012) *** Successfully decoded 3590403790 bytes Done in 8.04 s ==> 426.03 MB/s real 0m17.829s user 0m5.837s sys 0m2.206s I cannot do the same bench using fastlz default 6unpack program as it does not seem to be able to skip the filesystem based decompression.