*Possibly if you mmapped all of the files and then used madvise() or something t... | Hacker News

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DarkShikari on March 31, 2011 | parent | context | favorite | on: Why GNU grep is fast

Possibly if you mmapped all of the files and then used madvise() or something to prefetch in front of where you are. Maybe grep does that, I don't know?

It doesn't do that, and that's the first method I used in my hack.

fadvise() works just as well though, I think.

angusgr on March 31, 2011 [–]

It doesn't do that, and that's the first method I used in my hack.

Fair enough. :) If you feel like sharing then I'm very curious as to what the additional methods were.

DarkShikari on March 31, 2011 | [–]

It was a total hack, so I just opened files ahead of time, fadvised them, then closed them.

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