[Development] Deprecate the Keccak hashes in QCryptographicHash?
thiago.macieira at intel.com
Tue Jun 18 20:36:12 CEST 2019
On Tuesday, 18 June 2019 09:01:31 PDT Thiago Macieira wrote:
> They're the only ones we couldn't fall back to Linux's AF_ALG or OpenSSL's
> support, which often contain more optimised code that ours.
If we remove Keccak, then we could remove all the hash implementations from
QtCore, on Linux, and simply fall back to AF_ALG. See prototype at
I haven't benchmarked whether the kernel/userspace transitions make a
perceptible difference. But for any non-trivial content, we should expect a
performance gain if there's an implementation in
https://code.woboq.org/linux/linux/arch/x86/crypto/ (basically, SHA1, SHA256
Better than that, only if we used OpenSSL, but there's also a set-up cost
because EVP_MD will try to allocate memory.
Thiago Macieira - thiago.macieira (AT) intel.com
Software Architect - Intel System Software Products
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