What you need is adding the AES-NI and PCMUL flags to CXXFLAGS. I think I 
posted my GNUmakefile here several times. 

Sent from my iPad

> On Apr 9, 2015, at 04:21, Siyuan Ren <[email protected]> wrote:
> 
> I find a thread several years ago detailing why ASM is disabled on OS X. I 
> just wonder if this has changed.
> 
> I did a little test and CommonCrypto (the crypto API provided by OS X itself) 
> is consistently 50% faster than Crypto++, probably due to the use of AES-NI. 
> Performance is very important to me because I need to encrypt/decrypt very 
> large files on the fly.
> 
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