#8611: speed up cached_function and cached_method
---------------------------+------------------------------------------------
Reporter: jason | Owner: tbd
Type: enhancement | Status: new
Priority: major | Milestone: sage-4.4
Component: misc | Keywords:
Author: Jason Grout | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Comment(by davidloeffler):
Might it not be better for @cached_method to store its cache as an
attribute of the instance object, rather than having a single cache which
stores the values for all instances of that class?
E.g. the following code works for methods with no arguments:
{{{
def fast_cached_method(func):
def fast_func(some_instance):
try:
return getattr(some_instance, '_cache_' + func.__name__)
except AttributeError:
result = func(some_instance)
foo_instance.__dict__['_cache_' + func.__name__] = result
return result
return fast_func
}}}
I tested this and it's only about 1.5 times slower than doing the caching
"by hand", while your speeded-up version above is still about 40 times
slower.
David
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/8611#comment:4>
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