says, using mmap
from Perl is straightforward using the Mmap
module, which will map the file to a Perl string. You do have to be careful how you access the data; some operations will cause Perl to make a copy of the string, which is a bit of a problem with a 1GB string. substr
is pretty safe, and probably most other things as long as you're careful not to write anything to the string.
I wrote up a sample grep implementation using mmap here: Re: anyone have some good mmap examples?
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