Hi,
I am drawing some barcharts and scatter plot and the speed for rendering is
awful once you have
100 000 of dots. I ran python profiler which lead me to .startswith() calls and
some for loops
which append do a list repeatedly. This parts could be still sped up I think
but a first attempt
is here:
UNPATCHED 1.2.1
real 23m17.764s
user 13m25.880s
sys 3m37.180s
PATCHED:
real 6m59.831s
user 5m18.000s
sys 1m40.360s
The patches are simple and because I see elsewhere in the code list expansions
I do not see any
problems with backwards compatibility (new new python language features are
required).
Hope this helps,
Martin
--- lib/matplotlib/artist.py.ori 2013-08-09 13:46:22.000000000 +0200
+++ lib/matplotlib/artist.py 2013-08-09 13:46:36.000000000 +0200
@@ -827,7 +827,7 @@
"""
names = [name for name in dir(self.o) if
- (name.startswith('set_') or name.startswith('get_'))
+ (name[:4] in ['set_', 'get_'])
and callable(getattr(self.o, name))]
aliases = {}
for name in names:
--- lib/matplotlib/axes.py.ori 2013-08-09 13:46:16.000000000 +0200
+++ lib/matplotlib/axes.py 2013-08-09 13:46:44.000000000 +0200
@@ -4424,7 +4424,7 @@
for handle in self._get_legend_handles(legend_handler_map):
label = handle.get_label()
#if (label is not None and label != '' and not label.startswith('_')):
- if label and not label.startswith('_'):
+ if label and label[0] != '_':
handles.append(handle)
labels.append(label)
@@ -8135,7 +8135,7 @@
patches = []
- if histtype.startswith('bar'):
+ if histtype[:3] == 'bar':
totwidth = np.diff(bins)
if rwidth is not None:
@@ -8183,7 +8183,7 @@
bottom[:] = m
boffset += dw
- elif histtype.startswith('step'):
+ elif histtype[:4] == 'step':
# these define the perimeter of the polygon
x = np.zeros( 4*len(bins)-3, np.float )
y = np.zeros( 4*len(bins)-3, np.float )
------------------------------------------------------------------------------
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