Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl-Sensitive Sunglasses

Re^2: Hash key or value string reuse?

by QM (Parson)
on Jun 16, 2009 at 21:11 UTC ( #772141=note: print w/replies, xml ) Need Help??

in reply to Re: Hash key or value string reuse?
in thread Hash key or value string reuse?

How big is yours and why do you think you need to reduce its size?
I have a hash on disk that exceeds 42GB. I use a hash to avoid duplicates. Walking the hash through DBM::Deep takes about 5x longer than the equivalent memory hash. Of course, I haven't tried it on one this big, so it's much likely worse.

There isn't any super tricky thing that "re-uses" strings via a pointer to that string.
Thanks. I was just wondering if Perl already did this for me. Since that's not the case, it might be worth a try.

Quantum Mechanics: The dreams stuff is made of

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://772141]
and all is quiet...

How do I use this? | Other CB clients
Other Users?
Others studying the Monastery: (8)
As of 2018-06-19 09:46 GMT
Find Nodes?
    Voting Booth?
    Should cpanminus be part of the standard Perl release?

    Results (113 votes). Check out past polls.