Hello,
I just realised, that between PHP4 and PHP5 we changed the hash function
used within zend_hash.h from DJBX33X to DJBX33A. The diff is here =>
http://cvs.php.net/diff.php/ZendEngine2/zend_hash.h?ws=0&r1=1.57&r2=1.58&ty=u
Does anyone remember the exact reason for that? Or was the change done
by accident when the loops were unrolled? I have no idea if there is a
big difference for our hashing needs, but I am just curious if we
changed it because of benchmarks...
Stefan Esser
--
Stefan Esser sesser@php.net
Hardened-PHP Project http://www.hardened-php.net/
GPG-Key gpg --keyserver pgp.mit.edu --recv-key 0x15ABDA78
Key fingerprint 7806 58C8 CFA8 CE4A 1C2C 57DD 4AE1 795E 15AB DA78
Hello Stefan,
as said in private already. This pretty much looiooks like a take over
problem. And as a sidenote, loop unwinding with string algorithmns should
take care of byte alignment. Both said the code is damn wrong.
marcus
Sunday, November 20, 2005, 4:37:17 PM, you wrote:
Hello,
I just realised, that between PHP4 and PHP5 we changed the hash function
used within zend_hash.h from DJBX33X to DJBX33A. The diff is here =>
http://cvs.php.net/diff.php/ZendEngine2/zend_hash.h?ws=0&r1=1.57&r2=1.58&ty=u
Does anyone remember the exact reason for that? Or was the change done
by accident when the loops were unrolled? I have no idea if there is a
big difference for our hashing needs, but I am just curious if we
changed it because of benchmarks...
Stefan Esser
--
Stefan Esser sesser@php.net
Hardened-PHP Project http://www.hardened-php.net/
GPG-Key gpg --keyserver pgp.mit.edu --recv-key 0x15ABDA78
Key fingerprint 7806 58C8 CFA8 CE4A 1C2C 57DD 4AE1 795E 15AB DA78
Best regards,
Marcus