Do you choose BJWFlate or 7za to do compression? I once used BJWFlate but found it too slow. Now I use 7za with 10 different settings: fb=128 and pass=1 to 10. It is really a job which you should find a balance point between time cost and compression ratio. I want to know your favorite settings as my reference. Thanks.

> Do you choose BJWFlate or 7za to do compression? I once used BJWFlate but found
> it too slow. Now I use 7za with 10 different settings: fb=128 and pass=1 to 10.
> It is really a job which you should find a balance point between time cost and
> compression ratio. I want to know your favorite settings as my reference.
> Thanks.
>


I usually only do a 2 pass 7z run.

[ZIPMAX]

work-recursive = 1
skip-internzip = 1
logfile = 0
thread-priority = below_normal
nobeep = 0
setcurrenttime = 0
showpackerwindow = 0
skipreadonly = 0
skiparchive = 0
setcurrentreadonly = 0

packer-exe-1 = 7z.exe
packer-cmd-1 = a -mpass=4 -mfb=255 -r -y -tzip %1 %2

packer-exe-2 = 7z.exe
packer-cmd-2 = a -mx -mpass=4 -r -y -tzip %1 %2

finalstep-exe = deflopt.exe
finalstep-cmd = %1



Roman Scherzer

> I usually only do a 2 pass 7z run.

I see, that's the given example in zipmax.ini. Thanks.

> I usually only do a 2 pass 7z run.

I just use your setting to compress a full set of CPS1 and found it better than using mine (mx=9, mfb=258, mpass=from 1 to 10, means 10 external zip in all) in both time cost and compression ratio.

Can you tell me more things? Why these 2, are they a little special than any others? I know it hard to compare between different parameter, but I think there are some reasons can be told, more or less. Thanks very much.

> > I usually only do a 2 pass 7z run.
>
> I just use your setting to compress a full set of CPS1 and found it better than
> using mine (mx=9, mfb=258, mpass=from 1 to 10, means 10 external zip in all) in
> both time cost and compression ratio.
>
> Can you tell me more things? Why these 2, are they a little special than any
> others? I know it hard to compare between different parameter, but I think there
> are some reasons can be told, more or less. Thanks very much.
>


Did you use the deflopt run, too? If yes....well...no idea what 7za does with the one and the other setting...8) Can't tell you why it works a little bit better....you have to ask some zip magicians.


Roman Scherzer

> Did you use the deflopt run, too? If yes....well...no idea what 7za does with
> the one and the other setting...8) Can't tell you why it works a little bit
> better....you have to ask some zip magicians.

Yes, I use deflopt as final step too. Thanks all the same. Anyway, I like your setting:)