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| author | Christopher Whelan <topherwhelan@gmail.com> | 2019-02-25 23:13:38 -0800 |
|---|---|---|
| committer | Christopher Whelan <topherwhelan@gmail.com> | 2019-03-09 23:41:36 -0800 |
| commit | 5785ca7bef5c0a44042f34c496bceeb79161cd8a (patch) | |
| tree | 1fe38c726fa96d7993f2412be27d392fff0d42ce /doc/release | |
| parent | cbf3a081271a43e980e3c2f76625deb43fd53922 (diff) | |
| download | numpy-5785ca7bef5c0a44042f34c496bceeb79161cd8a.tar.gz | |
ENH: Create boolean and integer ufuncs for isnan, isinf, and isfinite.
Previously, boolean values would be routed through the half implementations of
these functions, which added considerable overhead. Creating specialized
ufuncs improves performance by ~250x
Additionally, enable autovectorization of new isnan, isinf, and isfinite ufuncs.
Diffstat (limited to 'doc/release')
| -rw-r--r-- | doc/release/1.17.0-notes.rst | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/doc/release/1.17.0-notes.rst b/doc/release/1.17.0-notes.rst index cd547c2b4..3dcdf6660 100644 --- a/doc/release/1.17.0-notes.rst +++ b/doc/release/1.17.0-notes.rst @@ -163,6 +163,12 @@ thereby saving a level of indentation In some cases where ``np.interp`` would previously return ``np.nan``, it now returns an appropriate infinity. +Specialized ``np.isnan``, ``np.isinf``, and ``np.isfinite`` ufuncs for bool and int types +----------------------------------------------------------------------------------------- +The boolean and integer types are incapable of storing ``np.nan`` and ``np.inf`` values, +which allows us to provide specialized ufuncs that are up to 250x faster than the current +approach. + Changes ======= |