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Precompile accessors.

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This improves packing speed by 8x, which is visible on small or
low-quality frames.
This commit is contained in:
Steven Robertson 2011-10-12 11:50:07 -04:00
parent a12714f4c4
commit d409f02e4a
1 changed files with 5 additions and 4 deletions
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9
cuburn/code/util.py
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@ -230,11 +230,12 @@ class DataPacker(HunkOCode):
def _access(self, view, accessor, name):
if name in self.packed:
pview, paccessor = self.packed[name]
pview, paccessor, pcomp = self.packed[name]
if pview == view and (accessor is None or paccessor == accessor):
return
raise ValueError("Same name, different accessor or view: %s" % name)
self.packed[name] = (view, accessor)
comp_accessor = compile(accessor, '{{template}}', 'eval')
self.packed[name] = (view, accessor, comp_accessor)
self.packed_order.append(name)
def __len__(self):
@ -251,11 +252,11 @@ class DataPacker(HunkOCode):
subbed_nses = {}
for i, name in enumerate(self.packed_order):
view, accessor = self.packed[name]
view, accessor, comp = self.packed[name]
if view not in subbed_nses:
subbed_nses[view] = view._apply_subs(dict(base_ns))
try:
val = eval(accessor, subbed_nses[view])
val = eval(comp, subbed_nses[view])
except Exception, e:
print 'Error while evaluating accessor "%s"' % accessor
raise e