That's not right for all apps, even for 64 bits apps

 

I know a person was working on the benchmark for large system in a big computer company. Probably 10 years back some server just started using 64 bits CPU. He was doing the benchmark comparsion between 32 and 64 bits apps. The result is the most of 32 bits apps are faster unless apps does some special 64 bits optimization.Only those really need 64 bits apps, such as graphcs intensive, or large database.

Things might be changed because 64 bits compliation may already built-in 64 bits optimization, just recompliing source code with 64 bits complier may improve the performance(but if this is the case, it also will use more memory).

所有跟帖： 

• Most of 32 bits apps are slower on 64 bits -playForever- ♂ (0 bytes) () 05/10/2011 postreply 14:08:01

• 64位操作系统跑32位应用软件，是杀鸡用牛刀。 -加州老李- ♀ (0 bytes) () 05/10/2011 postreply 14:48:16

• 你说的是老黄历了，现在的64位CPU早就解决这个问题了 -flywhc- ♂ (0 bytes) () 05/11/2011 postreply 16:13:27

• 这里有篇这方面的文章，值得一读。 -加州老李- ♀ (81 bytes) () 05/10/2011 postreply 14:39:29

• 64位计算机的总线和寄存器速度都比32位的快。这里有篇微软的文章 -加州老李- ♀ (244 bytes) () 05/10/2011 postreply 14:46:32