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authorTim Peters <tim.peters@gmail.com>2004-08-31 02:19:55 (GMT)
committerTim Peters <tim.peters@gmail.com>2004-08-31 02:19:55 (GMT)
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HardwareRandom: Go back to multiplying by 2**-BPF instead of using
ldexp. Both methods are exact, and return the same results. Turns out multiplication is a few (but just a few) percent faster on my box. They're both significantly faster than using struct with a Q format to convert bytes to a 64-bit long (struct.unpack() appears to lose due to the tuple creation/teardown overhead), and calling _hexlify is significantly faster than doing bytes.encode('hex'). So we appear to have hit a local minimum (wrt speed) here.
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