First of all, thank you! 7zip is a great program that successfully replaced Winrar and Winzip on my computer. The only problem I've encountered so far is compression\decompression speed. So, is there any chance of MMX optimizations?
Do you seriously think that the decompression speed is a problem??
On some computers lzma decompression speed is higher than tar decompression speed.
I'm not a programmer, but I asume that if the code should be MMX optimized, it would require Igor to purchase a better compiler for his code, which cost's money, so if you really want it, why not donate?
There is no code in LZMA that can be optimized with MMX.
Maybe in future, when 7-Zip will have multimedia algotithms, it will be possible to use MMX.
I have actually gone back to compressing everything with standard Zip (I know, I know!). I just like the speed of decompression which is the highest on my system (approx 60% faster than LZMA). I use 7-zip to create my archives and handle them, but ZIP just does the job for me because of the speed, it makes a big big! difference to me because I work with big files - mostly videos so archives will often be over 1GB in size.
MMX? huhuh... dont think that 7zip use much of the floating point stuff...
Well, MMX may be used for integer maths as well (it's commonly used for sound mixing which is 100% integer math)