Decompressing problems

[felice2011]

The result seems to be obvious ...

pzlib+srep64+zcm

-↓- [ CMD Bench.Test.Info v0.6.9c ] -↓- Compressed Archive Completed At -↓- 18/11/2016 13:06:20
=============================================================================================================================================
 ○ [ ALGORITHM ] ○ [ INPUT SIZE ] ○ [ OUTPUT SIZE ] ○ [ RATIO.% ] ○ [ ARCHIVED FILES ] ○ [ COMP.TIME ] ○ [ SYNTAX - OPTIONS - ARGUMENTS ] ○

             Arc         981,1°MB          453,2°MB        46,19%              1°Files    00:11:11:329   a -ma9 -ds -lc1024 -ld1024 -ep1 -di -i2 -ed -r -s; -w"temp" -mpzlib+srep64+zcm 
=============================================================================================================================================

srep64+pzlib+zcm

-↓- [ CMD Bench.Test.Info v0.6.9c ] -↓- Compressed Archive Completed At -↓- 18/11/2016 13:18:14
=============================================================================================================================================
 ○ [ ALGORITHM ] ○ [ INPUT SIZE ] ○ [ OUTPUT SIZE ] ○ [ RATIO.% ] ○ [ ARCHIVED FILES ] ○ [ COMP.TIME ] ○ [ SYNTAX - OPTIONS - ARGUMENTS ] ○

             Arc         981,1°MB          693,5°MB        70,69%              1°Files    00:10:52:408   a -ma9 -ds -lc1024 -ld1024 -ep1 -di -i2 -ed -r -s; -w"temp" -msrep64+pzlib+zcm 
=============================================================================================================================================

I do not understand what benefits or on what files with pzlib support, should be inserted the "pzlib" pre-compressor at second reading in a concatenated method ...