overlap at full windowSize for max compression level
overlap at full windowSize for max compression level

as it provides max compression ratio

Cyan4973/zstd,Majlen/zstd,Cyan4973/zstd,Cyan4973/zstd,Majlen/zstd,Majlen/zstd,Majlen/zstd,Cyan4973/zstd,Cyan4973/zstd