Dear Monks,
What's the most efficient way to create and reference a key only hash (In general, but specifically in a mod-perl environment)? Is it:
#!/usr/bin/perl -w
use strict;
my %hash1 = (
shave => '',
the => '',
modern => '',
way => '',
);
my %hash2 = (
shave => 1,
the => 1,
modern => 1,
way => 1,
);
my $word = 'modern';
if( exists($hash1{$word}) ) {
print "Word $word is in hash1\n";
}
if( $hash2{$word} ) {
print "Word $word is in hash2\n";
}
I am aware of perl is a profligate wastrel when it comes to memory use.
But the -DL and warn(!!!) hacks don't work on my Perl v5.8.8.
I don't get any memory debugging with:
export PERL_DEBUG_MSTATS=1
perl test_hasheffeciency.pl
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