replace Hint() with a int(hexlify()). Saves 20% on sign(), 10% on verify().
replace Hint() with a int(hexlify()). Saves 20% on sign(), 10% on verify().

% python setup.py speed
running speed
    generate: 3.57ms (3.57ms 3.58ms 3.58ms)
        sign: 9.95ms (9.95ms 10.04ms 10.06ms)
      verify: 10.92ms (10.92ms 11.03ms 11.04ms)
 decodepoint: 802.12us (802.12us 805.45us 859.47us)
   decodeint: 472.83us (472.83us 473.19us 475.02us)
  scalarmult: 5.48ms (5.48ms 5.50ms 5.51ms)
    pt_xform: 0.82us (0.82us 0.82us 0.84us)
     xpt_add: 3.55us (3.55us 3.59us 3.59us)
  pt_unxform: 40.03us (40.03us 40.03us 40.37us)
 encodepoint: 168.53us (168.53us 168.65us 168.85us)
        Hint: 4.04us (4.04us 4.05us 4.06us)
    xrecover: 333.85us (333.85us 333.88us 335.04us)

warner/python-pure25519