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_decimal is now 100x faster than the Python version in the pi benchmark.

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Stefan Krah 2012-04-09 20:31:15 +02:00
parent dd159ce606
commit 0c0914edb0
2 changed files with 3 additions and 3 deletions
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4
Doc/whatsnew/3.3.rst
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@ -628,7 +628,7 @@ The new C version of the decimal module integrates the high speed libmpdec
library for arbitrary precision correctly-rounded decimal floating point library for arbitrary precision correctly-rounded decimal floating point
arithmetic. libmpdec conforms to IBM's General Decimal Arithmetic Specification. arithmetic. libmpdec conforms to IBM's General Decimal Arithmetic Specification.
Performance gains range from 10x for database applications to 80x for Performance gains range from 10x for database applications to 100x for
numerically intensive applications. These numbers are expected gains numerically intensive applications. These numbers are expected gains
for standard precisions used in decimal floating point arithmetic. Since for standard precisions used in decimal floating point arithmetic. Since
the precision is user configurable, the exact figures may vary. For example, the precision is user configurable, the exact figures may vary. For example,
@ -640,7 +640,7 @@ at http://www.bytereef.org/mpdecimal/quickstart.html.
+---------+-------------+--------------+-------------+ +---------+-------------+--------------+-------------+
| | decimal.py | _decimal | speedup | | | decimal.py | _decimal | speedup |
+=========+=============+==============+=============+ +=========+=============+==============+=============+
| pi | 42.75s | 0.58s | 74x | | pi | 38.89s | 0.38s | 100x |
+---------+-------------+--------------+-------------+ +---------+-------------+--------------+-------------+
| telco | 172.19s | 5.68s | 30x | | telco | 172.19s | 5.68s | 30x |
+---------+-------------+--------------+-------------+ +---------+-------------+--------------+-------------+

2
Misc/NEWS
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@ -147,7 +147,7 @@ Library
- Issue #7652: Integrate the decimal floating point libmpdec library to speed - Issue #7652: Integrate the decimal floating point libmpdec library to speed
up the decimal module. Performance gains of the new C implementation are up the decimal module. Performance gains of the new C implementation are
between 12x and 80x, depending on the application. between 10x and 100x, depending on the application.
- Issue #3573: IDLE hangs when passing invalid command line args - Issue #3573: IDLE hangs when passing invalid command line args
(directory(ies) instead of file(s)) (Patch by Guilherme Polo) (directory(ies) instead of file(s)) (Patch by Guilherme Polo)