Re: slow job with many files?

On 1/31/26 15:25, Arno Lehmann via Bacula-users wrote:
> for c in md5 sha1 sha256 sha512; do openssl speed -bytes 65536 \
> -seconds 10 -evp $c 2>/dev/null | grep -E '^'$c ; done

For clarity, higher numbers here are better.

For a datapoint as a matter of interest, on my AMD Ryzen 9, sha512 is 
slightly faster than md5; sha256 roughly 2.2 times faster than sha512; 
and sha1 only perhaps 7% faster than sha256.

So a newer and much stronger hash is *not necessarily* slower than 
old-school md5, and may even be faster.  The overhead of storing the 
larger hash is, frankly, trivial.  On my hardware, the best 
bang-for-the-buck of time vs. strength is probably sha256.  sha512 is 
stronger, but *for this purpose*, probably not in any truly meaningful way.


-- 
   Phil Stracchino
   Fenian House Publishing
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