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performance hack #3

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performance hack #3

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20 changes: 9 additions & 11 deletions python-ffi/Data/Array.py
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Original file line number Diff line number Diff line change
@@ -1,21 +1,19 @@
import functools
import itertools
_range = range
_filter = filter

_buitins = {"range": range, "filter": filter}


def _rangeImpl(start):
def range(start, _range=_range):
def ap(end):
step = 1 if start <= end else -1
return tuple(_buitins["range"](start, end + step, step))
step = (-1, 1)[start <= end]
return tuple(_range(start, end + step, step))

return ap

def replicate(count, _repeat=itertools.repeat):
return lambda value: tuple(_repeat(value, count))

globals()["range"] = _rangeImpl


replicate = lambda count: lambda value: tuple([value for _ in _buitins["range"](count)])

# The following code hasn't got specially improved.

def _mkFromFoldableImpl():
class Cons:
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