Ron Adam <[email protected]> added the comment:
A simple test to show the difference.
BEFORE:
$ python3 -mtimeit "def y(n):" " for x in range(n):" " yield x"
"sum(y(10))"
100000 loops, best of 3: 3.87 usec per loop
$ python3 -mtimeit "def y(n):" " for x in range(n):" " yield x"
"sum(y(1000000))"
10 loops, best of 3: 186 msec per loop
AFTER:
$ ./python -mtimeit "def y(n):" " for x in range(n):" " yield x"
"sum(y(10))"
100000 loops, best of 3: 3.81 usec per loop
$ ./python -mtimeit "def y(n):" " for x in range(n):" " yield x"
"sum(y(1000000))"
10 loops, best of 3: 168 msec per loop
before after
y(10) usec's 3.87 3.81 - 1.55%
y(1000000) msec's 186 168 - 9.67%
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<http://bugs.python.org/issue13607>
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