Which compressor to choose ?

There are a number of compression software available on this website, so it becomes difficult to know which one is the "best", and therefore which one to use.

This thread is created in an attempt to guide the user towards his optimal choice.

Classification by performance index :

Best Compression Ratio :
TNT2
2nd choice : BZ2

Best Compression Speed :
R.O.C
2nd choice : FastLZD
3rd choice : BZ2.Speed

Best Decompression Speed :
LZD
2nd choice : BZ2

Lowest Memory requirements :
R.O.C
2nd choice : LZD



Recommendation per usage :

BZ-Compatibility :
BZ2

Everyday Frequent use :
R.O.C

Software released in compressed format :
LZD