[Zope3-dev] Re: [Zope-dev] 64-bit BTrees

[Shane Hathaway]

Wichert Akkerman wrote:
> Previously Chris Withers wrote:
> 
>>The implicit change to make them all 64-bits which results in some 
>>unknown slowdown for all "I" BTree users seems a bit too scary to bite 
>>off...
> 
> 
> Has anyone done any benchmarks to prove that 64-bits is slower or
> faster? It would be interesting to see benchmarks on modern 32bit
> and a 64bit systems. Until then it's all hand-waiving.

One data point: on my AMD 64 box, when I run 32 bit Linux, I get about 
30,000 pystones, while 64 bit Linux yields 50,000 pystones.  This 
doesn't mean 64 bit code is necessarily faster, but it does suggest that 
64 bit CPUs prefer 64 bit code.

Shane