[Python-Dev] windows 2.5 build: use OpenSSL for hashlib [bug 1535502]

[Gregory P. Smith]

On Tue, Aug 08, 2006 at 08:26:08AM +0200, "Martin v. L?wis" wrote:
> Gregory P. Smith schrieb:
> > Widely deployed popular applications use python for both large scale
> > hashing and ssl communications.
> 
> Yet, nobody has worried about performance in all these years to notice
> that the assembler code isn't being used. So it can't be that bad.
> For SSL specifically, the usage of hashing is minimal, as the actual
> communication uses symmetric encryption.

OpenSSL uses x86 asm to speed up other things besides hashes.  For SSL
sockets each new connection requires an RSA or DSA public key
operation for the symmetric key exchange.  Huge speedup there:

2ghz pentium-m with C ssl:
                   sign    verify    sign/s verify/s
 rsa 1024 bits 0.007576s 0.000368s    132.0   2715.4
                   sign    verify    sign/s verify/s
 dsa 1024 bits 0.003655s 0.004409s    273.6    226.8

2ghz pentium-m with x86 asm ssl:
                   sign    verify    sign/s verify/s
 rsa 1024 bits 0.003410s 0.000171s    293.3   5843.5
                   sign    verify    sign/s verify/s
 dsa 1024 bits 0.001632s 0.001987s    612.9    503.4

[data comes from running "out32\openssl speed" in openssl 0.9.8b]