No benchmark results for i386 and 32 bit arm.

[funny-falcon]

Though, this platforms are going to die, there is still wide adoption of.
So, it should be mention, which performance to expect from Mum, compared for other well performed 32bit hash functions.

[vnmakarov]

I'll probably add a variant for 32-bit platforms. I need some time to think how to do it better. The current MUM speed for i386 is between Spooky and City. Here are the results on i7-4790K in 32-bit mode:

+++8-byte speed (1,280M keys):
Spooky   :  29.27s
City     :  17.70s
xxHash   :  60.22s
SipHash24:  77.74s
MUM      :  19.89s
+++16-byte speed (1,280M keys):
Spooky   :  61.31s
City     :  20.53s
xxHash   :  68.04s
SipHash24:  96.74s
MUM      :  27.47s
+++32-byte speed (1,280M keys):
Spooky   :  71.92s
City     :  26.21s
xxHash   :  87.67s
SipHash24:  132.17s
MUM      :  39.19s
+++64-byte speed (1,280M keys):
Spooky   :  112.94s
City     :  32.88s
xxHash   :  101.65s
SipHash24:  204.99s
MUM      :  68.26s
+++128-byte speed (1,280M keys):
Spooky   :  194.37s
City     :  75.55s
xxHash   :  128.00s
SipHash24:  350.30s
MUM      :  124.85s
+++Bulk speed 1KB (100M keys):
Spooky   :  41.21s
City     :  28.28s
xxHash   :  40.07s
SipHash24:  187.30s
MUM      :  67.16s