12 Dec
2013
12 Dec
'13
13:01
On Thu, 12 Dec 2013, Stefan Seyfried wrote:
The code generated for x86_64 can be much faster in data operations, because compiler can make use of wider range of CPU registers, and register access is obviously faster than accessing memory.
And cache is faster than memory, too, so 64 bit code with its higher memory footprint might be slower :-)
Linux x32 ABI is trying to overcome at least the "data" portion of this problem (of course instriction cache would still need to operate on 64 bits). -- Jiri Kosina SUSE Labs -- To unsubscribe, e-mail: opensuse-kernel+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-kernel+owner@opensuse.org