On 27 October 2005 09:05, John Meacham wrote:

but an alignment issue sounds more likely, if we are stradling 4 byte boundries with our 8 byte pointers and ints, that could affect things very much. it is the number one cause of performance problems according to the AMD optimization manual.

AFAIK we never misalign 8-byte things on x86_64. We align everything to 8 bytes. Cheers, Simon