On Tue, Jan 29, 2008 at 11:47:57PM +0000, brian m. carlson wrote: > And now for some numbers, on an amd64 machine (/proc/cpuinfo at [0]), Oh and I missed that at the first read, but … > With -fPIE -pie only: > > MD4: 335544320 bytes in 0.741s (431.703 MiB/s) > MD5: 335544320 bytes in 1.052s (304.173 MiB/s) > RMD160: 335544320 bytes in 1.755s (182.381 MiB/s) > SHA1: 335544320 bytes in 1.797s (178.104 MiB/s) > SHA256: 335544320 bytes in 3.517s (90.996 MiB/s) Of course it has no hit on amd64, it has all the relative operations needed to support PIE properly, and is not register starved. Benches have to be performed on x86 to have any valuable sense. With everything enabled, I expect on many applications on x86 to get on a regular basis 10% to 15% performances hit. Of course, on an architecture like amd64, I rather expect it to rarely be over a few percent. And as despise-able x86 is, it's still by a definite margin one of the most used architecture in Debian. -- ·O· Pierre Habouzit ··O madcoder@debian.org OOO http://www.madism.org
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