On 2014/11/04 21:34, jose isaias cabrera wrote:
Greetings!
I have an application that is written for x32 machines. However, we now have a
few machines that are x64 and all is well when we are using the precompiled x32
DLLs provided by http://www.sqlite.org/download.html. Changing the x32 DLLs to
x64 DLLs, will it show any difference in speed on the x64 machines? Thanks.
Yeah, might even be slower, but so negligibly that you won't notice.
Important to note (which many people seem to miss) is that the step up from 32 to 64 bit computing is an increase in computing
accuracy and capacity, not in speed, though computations on historic 64 bit variables (which used to be split up into two or more
values to work) might be faster, but they generally make up less than 1% of the computations in any sane software system (though
exceptions do exist) and so the speed increase is usually miniscule. On the downside, a 64-bit system uses 64 bit values for all
registers even where 32-bit values could have sufficed, and so all internal looping through bits or register shifts take longer, but
generally by negligible amounts. (All modern processors are 64 bit anyway - 32 bit OSes still exist for legacy reasons only).
It isn't a magic boost - The best way to think of the 64 bit upgrade in normal programming is: "Able to do larger accuracy
calculations at more or less the same speed".
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