Re: genexp performance problem?
- From: "Giovanni Bajo" <noway@xxxxxxxxx>
- Date: Wed, 31 May 2006 08:12:01 GMT
Fredrik Lundh wrote:
I found this strange:
python -mtimeit "sum(int(L) for L in xrange(3000))"
100 loops, best of 3: 5.04 msec per loop
python -mtimeit "import itertools; sum(itertools.imap(int,
xrange(3000)))" 100 loops, best of 3: 3.6 msec per loop
I thought the two constructs could achieve the same speed.
hint: how many times to the interpreter have to look up the names
"int"
and "L" in the two examples ?
Ah right, thanks!
--
Giovanni Bajo
.
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