Robin Becker wrote:
Skip Montanaro wrote:
......
I'm not sure why the mmap() solution is so much slower for you.
Perhaps on
some systems files opened for reading are mmap'd under the covers.
I'm sure
it's highly platform-dependent. (My results on MacOSX - see below - are
somewhat better.)
..... as a data point with sscan0/1.py (slight mods of your code) I get this
with a 200mb file on freeBSD 4.9
/usr/RL_HOME/users/robin/sstest:
$ python sscan0.py xxx_200mb.dat
fn=xxx_200mb.dat n=3797470 l=181012689 time=7.37
/usr/RL_HOME/users/robin/sstest:
$ python sscan1.py xxx_200mb.dat
fn=xxx_200mb.dat n=3797470 l=181012689 time=129.65
/usr/RL_HOME/users/robin/sstest:
ie the freeBSD vm seems to thrash just as nastily as xp :(
--
Robin Becker
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