Leon Rosenberg-3 wrote: > > Could you provide some additional information? > So far 64bit machines always outperformed 32bit machines in my > personal benchmarks as well as in third party benchmarks I stumbled > upon. > > So it would be great if you could provide some links or explanations. > > thank you > leon >
It's for the very simple reason: 64bit machines have 64bit address! What is address! It's pointers if you are familiar with C, Pointers are 64bit integers. Pointer arithmetics will deal with 64bit addressed data. Arithmetic operations on 64bit takes app. twice long as 32bits. As this is used very many in compiled binaries pointer arithmetics, you should expect 64bit machines will give you slower performance, for cpu bound applications. Note that hardware clocking time also slower than 32 machines. However, if your application is "data intensive" (with heaps of data caches), larger memory can boost quite a lot. You may even get several time or more better through put than otherwise. That's why there is a push for 64 bit machine. Also there is another aspect of programming skills. Many servlet programmers don't understand underlying garbage collection algorithms. They tend to make use lot more memory. If you control memory use smartly, this can boost performance significantly as well! regards. -- View this message in context: http://www.nabble.com/Tomcat-with-8-GB-memory-tf4149367.html#a11837027 Sent from the Tomcat - User mailing list archive at Nabble.com. --------------------------------------------------------------------- To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
