[nylug-talk] LOWMEM vs. HIGHMEM performance advantage?

Yusuke Shinyama yusuke at cs.nyu.edu
Fri Apr 18 21:21:06 EDT 2008


On Fri, 18 Apr 2008 20:02:08 -0400 (EDT), Alex Pilosov <alex at pilosoft.com> wrote:
> 
> x86-64 (i will call it x64 and spare me) - is *bad* idea *unless* you
> *have* to. because pointers are 64-bit, lots of structures are much larger
> in size, so your binaries and data are much larger in size, so you blow
> l2/l3 cache much faster, and use up more memory for same work.

Wasn't there a similar kind of argument in the 16->32bit transition era?

I'm wondering if we will ever overcome this in some near future, 
or we're going to stick with the same 32bit architecture for another
couple of decades (which is okay for me though.)

Yusuke


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