data1=$Session->{'key1'} data2=$Session->{'key2'} data3=$Session->{'key3'}
Does each statement cause a freeze/thaw of the whole Session data structure to/from disk?
No, each one does its own freeze/thaw just for that key / value pair.
In your code, you make one read only copy. Does this cause only one thaw? This is why your proposed trick would help, right?
The idea behind that is if you are just using it to look up lots of global values & db data, which is not recommended anyway, you might just init an in memory hash to reference in your code instead of going to the $Session each time, so perhaps better to...
$Session->Lock;
$SessionCopy = { %$Session };
$Session->UnLock;
...
$SessionCopy->{KEY};
$SessionCopy->{KEY};
$SessionCopy->{KEY};than to:
$Session->{KEY}
$Session->{KEY}
$Session->{KEY}but really better is to do this...
my $value = $Session->{KEY};
$value;
$value;Like I said, a lot of it depends on how you are programming. But overall, you want to make as few calls getting as little data from $Session as possible.
Regards,
Josh
________________________________________________________________ Josh Chamas, Founder phone:925-552-0128 Chamas Enterprises Inc. http://www.chamas.com NodeWorks Link Checking http://www.nodeworks.com
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