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v0.5.1
https://github.com/python/cpython
09 December 2020, 11:06:31 UTC
Revision 2761cd300484e870d15baab1761cd91a3ede9e20 authored by Mark Dickinson on 23 March 2009, 18:26:07 UTC, committed by Mark Dickinson on 23 March 2009, 18:26:07 UTC 
Blocked revisions 70542 via svnmerge
 
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  r70542 | mark.dickinson | 2009-03-23 18:25:13 +0000 (Mon, 23 Mar 2009) | 14 lines

  Issue #5512: speed up the long division algorithm for Python longs.
  The basic algorithm remains the same; the most significant speedups
  come from the following three changes:

    (1) normalize by shifting instead of multiplying and dividing
    (2) the old algorithm usually did an unnecessary extra iteration of
        the outer loop; remove this.  As a special case, this means that
        long divisions with a single-digit result run twice as fast as
        before.
    (3) make inner loop much tighter.

  Various benchmarks show speedups of between 50% and 150% for long
  integer divisions and modulo operations.
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History
Tip revision: 2761cd300484e870d15baab1761cd91a3ede9e20 authored by Mark Dickinson on 23 March 2009, 18:26:07 UTC
Blocked revisions 70542 via svnmerge
Tip revision: 2761cd3
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