Huh?
http://sourceforge.net/projects/sevenzi ... ic/60638777-Zip 9.30 alpha Copyright (c) 1999-2012 Igor Pavlov 2012-10-26
Usage: 7z <command> [<switches>...] <archive_name> [<file_names>...]
[<@listfiles...>]
<Commands>
a: Add files to archive
b: Benchmark
d: Delete files from archive
e: Extract files from archive (without using directory names)
h: Calculate hash values for files
l: List contents of archive
t: Test integrity of archive
u: Update files to archive
x: eXtract files with full paths
<Switches>
-ai[r[-|0]]{@listfile|!wildcard}: Include archives
-ax[r[-|0]]{@listfile|!wildcard}: eXclude archives
-bd: Disable percentage indicator
-i[r[-|0]]{@listfile|!wildcard}: Include filenames
-m{Parameters}: set compression Method
-o{Directory}: set Output directory
-p{Password}: set Password
-r[-|0]: Recurse subdirectories
-scs{UTF-8 | WIN | DOS}: set charset for list files
-sfx[{name}]: Create SFX archive
-si[{name}]: read data from stdin
-slt: show technical information for l (List) command
-so: write data to stdout
-ssc[-]: set sensitive case mode
-ssw: compress shared files
-t{Type}: Set type of archive
-u[-][p#][q#][r#][x#][y#][z#][!newArchiveName]: Update options
-v{Size}[b|k|m|g]: Create volumes
-w[{path}]: assign Work directory. Empty path means a temporary directory
-x[r[-|0]]]{@listfile|!wildcard}: eXclude filenames
-y: assume Yes on all queries
It's had -m for a while, see my sample command line for -mx=9, -mfb=256, -mpass=5, -mem-AES256. In the docs I see nothing that seems to be what you want. Unless that's documented in some of the beta/alpha release threads, he kinda spreads the new info around in each thread and I haven't followed many of them. If you find something, post back!