regex over files

[Robin Becker]

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