Hi, On Mon, Aug 1, 2011 at 8:20 PM, Michael B. Brutman <mbbrut...@brutman.com> wrote: > On 8/1/2011 7:31 PM, Bernd Blaauw wrote: >> Op 30-7-2011 15:29, dos386 schreef: >>> Got the answer ??? >>> >>> - LZMA decompressible on 8086: YES >>> - LZMA vs NRV/UCL: LZMA (much?) slower decompression >>> - Ultra-Brutal-Effect: much slower compression, >>> no performance penalty on decompression (?) >> I did a quick test here by looking if UPX --ultra-brute --lzma --8086 >> generated smaller binaries than the one which are distributed in the >> MTCP/UPX file. And indeed smaller, so think Mike used default UPX >> settings ( --best --8086). It's indeed quite likely LZMA and UltraBrute >> options may at least cause slower loading (more decompression time >> required) or not work at all on 8086. If it does work however, awesome :) >> >> LZMA versus other alghorythms: likely slower indeed, but wasn't tested >> as Mike tested against uncompressed binaries (with longer DISK-reading >> time yet no time wasted on decompressing ofcourse). > > I'm willing to get out the stopwatch and retest now that I know more. > > There was a question about the which of the algorithms (LZMA, NRV, UCL) > is safe for GPL software. A quick review of the UPX web site did not > give me a clear answer on which one was used when I specified "-9 > --8086" for options. Does anybody know off the top of their heads?
I'd have to let Jim answer since he was directly involved. But I *think* all UPX'd "binaries" [sic] are okay (GPL-friendly), it's just UPX proper (default .EXE download using closed source NRV library) is "not free". So it's preferable to suggest people use UPX-UCL instead. If you use UPX-UCL (and compare to default .EXE), you will notice that UCL compresses slightly worse than NRV (though only slightly, we're not talking probably even 5%). But if you use LZMA, output should be identical. So I don't think you have to worry, but I'm not a lawyer (nor Jim's spokesperson), so you'd have to ask one of them instead. ;-) ------------------------------------------------------------------------------ BlackBerry® DevCon Americas, Oct. 18-20, San Francisco, CA The must-attend event for mobile developers. Connect with experts. Get tools for creating Super Apps. See the latest technologies. Sessions, hands-on labs, demos & much more. Register early & save! http://p.sf.net/sfu/rim-blackberry-1 _______________________________________________ Freedos-devel mailing list Freedos-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-devel
