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| author | Mark Dickinson <dickinsm@gmail.com> | 2009-09-16 21:23:34 (GMT) |
|---|---|---|
| committer | Mark Dickinson <dickinsm@gmail.com> | 2009-09-16 21:23:34 (GMT) |
| commit | 0a1efd0e4ce407b32854cfb8838ffbcf2a32481c (patch) | |
| tree | 414fdb03e6f2968fd2bca2d42a0610addc61ebf2 /Include/longintrepr.h | |
| parent | 3360401980429e71aaf1a6d304451b3771900394 (diff) | |
| download | cpython-0a1efd0e4ce407b32854cfb8838ffbcf2a32481c.zip cpython-0a1efd0e4ce407b32854cfb8838ffbcf2a32481c.tar.gz cpython-0a1efd0e4ce407b32854cfb8838ffbcf2a32481c.tar.bz2 | |
Issue #6713: Improve performance of str(n) and repr(n) for integers n
(up to 3.1 times faster in tests), by special-casing base 10 in
_PyLong_Format.
Diffstat (limited to 'Include/longintrepr.h')
| -rw-r--r-- | Include/longintrepr.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/Include/longintrepr.h b/Include/longintrepr.h index 7765172..3d71a35 100644 --- a/Include/longintrepr.h +++ b/Include/longintrepr.h @@ -50,12 +50,16 @@ typedef PY_INT32_T sdigit; /* signed variant of digit */ typedef PY_UINT64_T twodigits; typedef PY_INT64_T stwodigits; /* signed variant of twodigits */ #define PyLong_SHIFT 30 +#define _PyLong_DECIMAL_SHIFT 9 /* max(e such that 10**e fits in a digit) */ +#define _PyLong_DECIMAL_BASE ((digit)1000000000) /* 10 ** DECIMAL_SHIFT */ #elif PYLONG_BITS_IN_DIGIT == 15 typedef unsigned short digit; typedef short sdigit; /* signed variant of digit */ typedef unsigned long twodigits; typedef long stwodigits; /* signed variant of twodigits */ #define PyLong_SHIFT 15 +#define _PyLong_DECIMAL_SHIFT 4 /* max(e such that 10**e fits in a digit) */ +#define _PyLong_DECIMAL_BASE ((digit)10000) /* 10 ** DECIMAL_SHIFT */ #else #error "PYLONG_BITS_IN_DIGIT should be 15 or 30" #endif |