October 22nd, 2011, 11:58 AM
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First Lieutenant
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Join Date: Nov 2006
Posts: 739
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Re: 64x version of Dominions?
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Originally Posted by Deathblob
Quote:
Originally Posted by Loren
Quote:
Originally Posted by Deathblob
Yes! That's so true, if you are reading your 64-bit words over an 8-bit bus.
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The memory bus is at least 64 bits, that's not a problem.
The problem is 64 bit code is simply bigger than 32 bit code--fewer lines of code fit into the on-chip caches, you end up with more read cycles to memory. |
Well, I thought those reads should be twice as fast, so I didn't believe you, and went googling.
http://www.osnews.com/story/5768/Are...naries_/page1/
It's a bit old, and Sparc of all things. But looks like you are right. 
64bit had ~+20% bigger binaries, ~-10% slower execution. |
The 64bit processor reads everything faster, whether the executable is 32bit or 64bit. |
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