Ryan Kelly wrote:
Someone else wrote:
It will be the
same as the difference between a for loop and a call to map.
Not so. If you use the "dis" module to peek at the bytecode generated
for a list comprehension, you'll see it's very similar to that generated
for an explicit for-loop.
The usual advice is that if you have a built-in function that
does what you want done for each element, then using map() is
probably the fastest way.
However, if you need to create a Python function to pass to
map(), the list comprehension may well be faster, because it
avoids the cost of a Python function call per element.
--
Greg
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