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Registered Member #4266
Joined: Fri Dec 16 2011, 03:15AM
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Posts: 874
Hi, created a ramdisk speed it up from 1.16min to 59sec. The number of combinations I think might be to high, its 10 chars from 0 to 0xff. I read somewere that 10chars for md5 hash is doable with the right setup, I think they use graphics cards, below is some of the code, apart from asm i'm lost how to speed it up?
Registered Member #65
Joined: Thu Feb 09 2006, 06:43AM
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Posts: 1155
I recommended a dynamic programming abstraction given your algorithm has some overlapping subproblems (you add the same numbers many times in this example). However, you are skipping over some crucial steps by attempting to find more complex ways of permuting through W(k*n^3), rather than solving the actual problem.
ASM can be faster, but in most cases it is not due to architectural and automatic code optimizations of modern C/C++ compilers.
Registered Member #3215
Joined: Sun Sept 19 2010, 08:42PM
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Posts: 780
replace < and > with a mask
a good thing would be to use a single binay mask and << or >> the mask or the number to crunch
it is easy to see if a number is higher than a multiple of 2 with a mask, and increment this value either by the mask or the value with a pad by 2 operator
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CPU, graphics cards ,FPGA, multi pics/audino speed
