Linked by Thom Holwerda on Wed 2nd Dec 2009 23:25 UTC, submitted by estherschindler
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Member since:
2005-09-22
Not so. Regardless of Linux or Windows, when you compile an application for 64-bit, the compiler optimizes the code to utilize the extra general purpose and SSE registers. As silly as it sounds, often just compiling code to run on a 64 bit processor will show a not insignificant performance increase regardless of it's memory footprint.
What is a problem though is that many low level performance optimizations will likely have to be re-worked or re-thought in order to leverage the architecture effectively. Compilers are pretty good these days though often just a simple source-level re-compile for x64 can show a pleasant boost.