[Cython] Cython syntax to pre-allocate lists for performance
Yury V. Zaytsev
yury at shurup.com
Thu Mar 7 12:16:10 CET 2013
Hi,
Is there any syntax that I can use to do something like this in Cython:
py_object_ = PyList_New(123); ?
If not, do you think that this can be added in one way or another?
Unfortunately, I can't think of a non-disruptive way of doing it. For
instance, if this
[None] * N
is given a completely new meaning, like make an empty list (of NULLs),
instead of making a real list of Nones, it will certainly break Python
code. Besides, it would probably be still faster than no pre-allocation,
but slower than an empty list with pre-allocation...
Maybe
[NULL] * N ?
Any ideas?
--
Sincerely yours,
Yury V. Zaytsev
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