Message280123
The attached patch uses an existing function bits_in_digit() in two other functions:
- in long_bit_length() - it already had identical logic
- in _PyLong_NumBits() - it used a naive, slower way of calculating bit length, so as an added bonus the patch speeds it up a bit. It's visible in float-long comparison microbenchmark:
$ ./old -m timeit "1 == 1.0"
5000000 loops, best of 5: 55 nsec per loop
$ ./new -m timeit "1 == 1.0"
5000000 loops, best of 5: 52.3 nsec per loop
$ ./old -m timeit "12345678 == 12345678.0"
5000000 loops, best of 5: 70.4 nsec per loop
$ ./new -m timeit "12345678 == 12345678.0"
5000000 loops, best of 5: 53.5 nsec per loop |
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Date |
User |
Action |
Args |
2016-11-05 19:37:28 | Adrian Wielgosik | set | recipients:
+ Adrian Wielgosik |
2016-11-05 19:37:28 | Adrian Wielgosik | set | messageid: <1478374648.81.0.502575461924.issue28621@psf.upfronthosting.co.za> |
2016-11-05 19:37:28 | Adrian Wielgosik | link | issue28621 messages |
2016-11-05 19:37:28 | Adrian Wielgosik | create | |
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