gistfile1.txt

Tmimings on a Linux box, 32-bit kernel, 32-bit userland

Python version:                                        2.7                    3.1
-s"a=10**20;n=3" "(a>>n)&1"                   0.224 usec per loop     0.161 usec per loop
-s"a=10**20;n=3" "not not(a & (1 << n))"      0.155 usec per loop     0.183 usec per loop
-s"a=10**200;n=3" "(a>>n)&1"                  0.39 usec per loop      0.303 usec per loop
-s"a=10**200;n=3" "not not(a & (1 << n))"     0.158 usec per loop     0.177 usec per loop
-s"a=10**10;n=3" "(a>>n)&1"                   0.223 usec per loop     0.153 usec per loop
-s"a=10**10;n=3" "not not(a & (1 << n))"      0.158 usec per loop     0.18 usec per loop
-s"a=10**9;n=3" "(a>>n)&1"                    0.0734 usec per loop    0.152 usec per loop
-s"a=10**9;n=3" "not not(a & (1 << n))"       0.0877 usec per loop    0.178 usec per loop
-s"a=2**1000;n=64" "(a>>n)&1"                 0.442 usec per loop     0.363 usec per loop
-s"a=2**1000;n=64" "not not(a & (1 << n))"    0.241 usec per loop     0.187 usec per loop