Revision: 8965
http://matplotlib.svn.sourceforge.net/matplotlib/?rev=8965&view=rev
Author: efiring
Date: 2011-02-09 04:16:08 +0000 (Wed, 09 Feb 2011)
Log Message:
-----------
Normalize: major speed-up via bypassing masked array division
Modified Paths:
--------------
trunk/matplotlib/lib/matplotlib/colors.py
Modified: trunk/matplotlib/lib/matplotlib/colors.py
===================================================================
--- trunk/matplotlib/lib/matplotlib/colors.py 2011-02-08 13:27:16 UTC (rev
8964)
+++ trunk/matplotlib/lib/matplotlib/colors.py 2011-02-09 04:16:08 UTC (rev
8965)
@@ -853,8 +853,11 @@
mask = ma.getmask(result)
result = ma.array(np.clip(result.filled(vmax), vmin, vmax),
mask=mask)
- result -= vmin
- result /= vmax - vmin
+ # ma division is very slow; we can take a shortcut
+ resdat = result.data
+ resdat -= vmin
+ resdat /= (vmax - vmin)
+ result = np.ma.array(resdat, mask=result.mask, copy=False)
if is_scalar:
result = result[0]
return result
This was sent by the SourceForge.net collaborative development platform, the
world's largest Open Source development site.
------------------------------------------------------------------------------
The ultimate all-in-one performance toolkit: Intel(R) Parallel Studio XE:
Pinpoint memory and threading errors before they happen.
Find and fix more than 250 security defects in the development cycle.
Locate bottlenecks in serial and parallel code that limit performance.
http://p.sf.net/sfu/intel-dev2devfeb
_______________________________________________
Matplotlib-checkins mailing list
Matplotlib-checkins@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/matplotlib-checkins
