Cost vs return - aka worthiness debate

[artag]

since we are talking about decent space gains vs reasonable compression time:

Using 7zip in replace of internal compression, gives me a good decompression time, because
how it handles uncompressable blocks. Also, it gives me some times better compression than
internal LZMA (because it does not add overhead to uncompressable blocks, try with mkv/mp4 file
and you'll see).

To all the experienced users: what switches do you use for improving compression
time to sane levels (and lose some mb but stay practicall).

I'm talking about internal LZMA and 7zip LZMA.

Also, any advice for a (stable and tested) substitute to lzma(2)?

oodle?
the new lolz?


thanks

[elit]

Originally Posted by artag

Using 7zip in replace of internal compression, gives me a good decompression time, because
how it handles uncompressable blocks. Also, it gives me some times better compression than
internal LZMA (because it does not add overhead to uncompressable blocks, try with mkv/mp4 file
and you'll see).

Unless something changed, its exactly opposite in my experiences. 7zip never looked like skipping uncompressable data(but maybe it changed now?) to me and was much slower than FA -m5, only FA -mx seemed like to not skip. FA -m5 is the quickest LZMA I know, skipping everything that is compressed - the jumps it make during compression are very, very visible. Thats what arc.groups file is also for btw.

And for decompression, 7zip cannot even compare, it is using only single thread while FA can use 4 threads(if you compressed with -m5). Good luck beating that with 7zip.