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| author | Mark Dickinson <mdickinson@enthought.com> | 2011-06-04 17:14:23 (GMT) |
|---|---|---|
| committer | Mark Dickinson <mdickinson@enthought.com> | 2011-06-04 17:14:23 (GMT) |
| commit | 7ce0fa877565b6415a0384ba57c00f21b028b07f (patch) | |
| tree | 5074a6fb06bdca13603566fdcc7cdf66c5923e6a /Lib/test | |
| parent | 4dfcb1a00dbcbc76fcd152d652d3f83b53b14e45 (diff) | |
| download | cpython-7ce0fa877565b6415a0384ba57c00f21b028b07f.zip cpython-7ce0fa877565b6415a0384ba57c00f21b028b07f.tar.gz cpython-7ce0fa877565b6415a0384ba57c00f21b028b07f.tar.bz2 | |
Issue #12080: Fix a performance issue in Decimal._power_exact that causes some corner-case Decimal.__pow__ calls to take an unreasonably long time.
Diffstat (limited to 'Lib/test')
| -rw-r--r-- | Lib/test/decimaltestdata/extra.decTest | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/Lib/test/decimaltestdata/extra.decTest b/Lib/test/decimaltestdata/extra.decTest index fe8b77a..b630d8e 100644 --- a/Lib/test/decimaltestdata/extra.decTest +++ b/Lib/test/decimaltestdata/extra.decTest @@ -222,12 +222,25 @@ extr1700 power 10 1e-999999999 -> 1.000000000000000 Inexact Rounded extr1701 power 100.0 -557.71e-742888888 -> 1.000000000000000 Inexact Rounded extr1702 power 10 1e-100 -> 1.000000000000000 Inexact Rounded +-- Another one (see issue #12080). Thanks again to Stefan Krah. +extr1703 power 4 -1.2e-999999999 -> 1.000000000000000 Inexact Rounded + -- A couple of interesting exact cases for power. Note that the specification -- requires these to be reported as Inexact. extr1710 power 1e375 56e-3 -> 1.000000000000000E+21 Inexact Rounded extr1711 power 10000 0.75 -> 1000.000000000000 Inexact Rounded extr1712 power 1e-24 0.875 -> 1.000000000000000E-21 Inexact Rounded +-- Some more exact cases, exercising power with negative second argument. +extr1720 power 400 -0.5 -> 0.05000000000000000 Inexact Rounded +extr1721 power 4096 -0.75 -> 0.001953125000000000 Inexact Rounded +extr1722 power 625e4 -0.25 -> 0.02000000000000000 Inexact Rounded + +-- Nonexact cases, to exercise some of the early exit conditions from +-- _power_exact. +extr1730 power 2048 -0.75 -> 0.003284751622084822 Inexact Rounded + + -- Tests for the is_* boolean operations precision: 9 maxExponent: 999 |