map is useless!

[Shashwat Anand]

map is not needed. LC is great :D

On Sun, Jun 6, 2010 at 10:32 PM, Alain Ketterlin <
alain at dpt-info.u-strasbg.fr> wrote:

> rantingrick <rantingrick at gmail.com> writes:
>
> > Python map is just completely useless. [...]
>
> >>>> import time
> >>>> def test1():
> >       l = range(10000)
> >       t1 = time.time()
> >       map(lambda x:x+1, l)
> >       t2= time.time()
> >       print t2-t1
> >>>> def test2():
> >       l = range(10000)
> >       t1 = time.time()
> >       for x in l:
> >               x + 1
> >       t2 = time.time()
> >       print t2-t1
> >
> >>>> test1()
> > 0.00200009346008
> >>>> test2()
> > 0.000999927520752
> >>>> def test3():
>
> Well, not building the resulting list saves some time. But even if you
> do r.append(x+1) map appears to be slower...
>
> Try this:
>
> def test3():
>    l = range(10000)
>    t1 = time.time()
>     [ x+1 for x in l]
>     t2 = time.time()
>    print t2-t1
>
> I've not used map since I learned about list comprehensions.
>
> -- Alain.
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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