< fully searched segment : larger == more compression, slower, more memory (useless for fast)
< dispatch table : larger == faster, more memory
< match length searched : larger == faster decompression, sometimes less compression
< nb of searches : larger == more compression, slower
< see ZSTD_strategy definition above
< acceptable match size for optimal parser (only) : larger == more compression, slower
< largest match distance : larger == more compression, more memory needed during decompression